I'm going to weigh in on this interesting topic. I've now read all 4 pages so far, and it's a variety of opinions here.
Almost everything I do involving being online to some extent, or at the least having a device in my hand/otherwise nearby. Which is normal in the modern day, although I happily keep my data signal, GPS and other things switched off when not in use. How people have them on all day long I have no idea, I'd never get any peace and quiet! I am finding a preference for doing more things offline and by pen and paper whenever possible.
That's not to do with desiring peace and quiet, although it is a bonus. Seriously, nothing is quite as infuriating as a phone ringing or making endless amounts of beeps when you're in the middle of a bike ride or other exercise session when having the phone in hand is not possible. The majority of people do not seem to grasp the concept of not being permanently attached to a device, thankfully most people that know me have adapted to waiting for a response!
No, my desire to do more by pen and paper is from some farce with my Google account. Somehow, a few months back, it wiped out an absolute ton of my files on Keep notes and Docs while setting up a Gmail account. Don't ask me how that happened, I genuinely don't know. Ever since then, I've started swapping over more and more things to pen and paper, which is extremely handy and doesn't have an annoying tendency to fail or go wrong in general unlike a digital copy! Don't get me wrong, I use Docs for some things still, but I'd be lost without my paper backups.
So all that considered, I do still use paper timetables myself sometimes. Not always, obviously, as I do use RTT a lot. I want to use it for a possible journey plan later today, for example, thanks to the TfW allocations thing. The option to look at a paper timetable, especially in an area of poor mobile signal coverage, to plan my journey back is really handy especially on impulsive journeys.
I would miss the paper timetables, be they in poster or booklet format. I don't like QR codes, they're great for e-tickets but for general everyday use I'm not interested. Part of that bias is down to idiotic placement of them next to barcodes on products, which makes my job much more irritating.
I can see why the railway would want to cut out the cost of putting the posters up, but I would class a timetable poster as an essential item. As essential as having a price label in a supermarket! Permanently ceasing the printing of paper timetables for all the different routes, as someone who is very pro-recycling and very pro-environment, yes I would say it is time to cease those. It must cost a fortune to print those every year, and if they go I'd certainly like to get a final copy of the ones for my local routes as a memento of times gone by. 10 years ago, when I was doing an ALR, paper timetable booklets were incredibly handy but now they're not such an essential item. I still like them, but I could live without those.