Iām the same with regards to physical copies as the preferred choice but havenāt bought anything since a DnD sourcebook last year. I love the tactile natural of a large tome and they look great on a shelf and are a talking point for friends.
I use pdfs rarely if Iām playing online.
For reading the rules I want a dead-tree book, so my preferred option these days is games which bundle both physical copy and pdf together. Reading an entire rulebook on screen melts my eyeballs and turns my brain to mush.
Having pdf versions of character sheets and the like is wonderful. Well, it is wonderful if they are printer friendly.
Normally, when Iām running a game I have the physical book to hand, not the pdf. My phone is too old and too small to comfortably read rules or character sheets on it.
However, since everything is held online in these cursed days of covid, Iāve often got the pdf book open. All glory to the Ctrl F function, since RPG indexes still continue to be as much use as a chocolate teapot.
I still like my books. I canāt help it, the format just works for me and the pleasure factor canāt be ignored.
That said, Iām running a PbP game of Troika! at the moment and, while the asynchronous nature of the game is helping me get my footing (I havenāt run a game in decades), Iām increasingly curious about platforms.
Iām not sure Iāll ever want to ditch having physical books for my games, but getting a PDF with purchase is increasingly important to me. At the end of the day, pandemic notwithstanding, I think the realities of my lifestyle will increasingly point me online for game sessions and Iād be foolish to ignore the options available to facilitate that.
Iāll end with a question though: for anyone using some of the fancier optionsā¦ have you found them explicitly necessary? Are your players increasingly demanding of these kind of platforms? I feel like I can do a whole lot with simple Discord/Forum software and some very basic imaging software.
The only things Iāve ever used are 1) dice rolling, 2) chat/posts, and 3) fillable character sheets. Until Discord came along Iād not encountered a great way to do 1 and 2 that wasnāt explicitly part of an existing community other than Roll20, and I really didnāt feel like it made sense to all pop up on some forum somewhere to play with each other and not, you know, the locals. Iām still not sure how you would do nice functional character sheets playing through Discord. At least not as nice as Roll20 has for a whole shedload of games. But that thing has so many functions that are mostly relevant to D&D and games like D&D that it does feel like overkill on the other hand.
Yeah that last bit in particular is what has kept me from doing more than surface research on available options. I just donāt need the wealth of options available (I play squarely in the OSR space) and worry itāll be more of a burden than a help.
The online groups Iām in just use, er, dice. (In some cases dice apps on peopleās phones.)
Heh. We already fired one of our dice bots. If nothing else, having a formalized rolling format provides a kind of enforced honesty. 
I look at it this way: Itās a game, thatās all, and if you canāt trust people to roll the dice honestly then why would you want to play with them?
I look at it that way too. But not all do, and in this case itās flat out more convenient. [EDIT] Noting that Iām currently playing with 4 complete strangers.
Why would you ever fire a dice bot? They are all lovely.
I have written many dice bots. Including subtly cheating ones, when I was called on to do it. Itās very easy when you realise that what a human perceives as ārandom enoughā is quite disjoint from āactually randomā.
(https://github.com/Firedrake/discourse-dice-roller is the one thatās running here.)
I actually preferred the one we started with because of how easy it was to edit. Troika uses a D6 system, so you need to be able to roll things like D666 or 2D66. The one we changed to can make that happen, but itās cumbersome to type out. The one we fired let you save whatever roll formulas you wanted for easy repetitionā¦
ā¦but it also barely ever worked when called upon.
Yeah, sorry, was referring to the one we planted into our Discord game. I havenāt had a need to roll any dice over here yet. 
FYI if you want stuff like that added to the āotherā bot here just give me a shout.
@RogerBW thatās very cool and hilarious! Did you by any chance have anything to do with the dice rolling in Blood Bowl? I think the dice are skewed at higher difficulty to balance the poor AI decisions. Still, love that game so much.
With RP, when we were playing in person, two of our group would use their laptops for DnD Beyond, as they preferred it. Theyād still roll physical dice of course.
Must admit it keeps the space incredibly clean and makes travel a lot easier but you obviously canāt just pass over a laptop if someone wants to check a feat or whatever, though they can check things very quickly.
It works because we have a mix of books and the laptops.
Best of both worlds.
No, this was for local MUDs and things in the early 1990s and I donāt suppose any of them is still running now.
Excellent skills 
Excuse the mild derailing but:
(Hardly a MUD but the spirit is there).
I was expecting fixed-layout format on tablets and mobile phones to perform worse than they evidently do. Iām reconsidering my efforts to make Flat Black available in EPUB. But perhaps its time is coming.
Two of us are using media that are even more hip than I imagined. Is it VTT support?