Currently using my very first digital one, even when I am not that smart in using such fones. Major reason was the 50% discount last yr-also bought a 3-month paper one then and used it last autumn. I must say using this app is quite straightforward and quite easy. Plus that here ´on the continent´ currently in Germany and having used it in 6 other plus own country already; nearly all trains and most major stations have free wifi. I myself also since many years completely rely on that free wifi. Major, but very minor, grumble is that the app does not work that fast in that whole process of searching times, stating these as ´trip´ and then turn the switch into yellow as ´pass´. THis might perhaps be more an issue on passes with days to choose-mine is permanent.
FRom what I understand (check also forum for passes as community.eurail- loads of useful tips and advice, also from several englishmen) the pass-but ask first, can also be ordered from the few remaining British private ticket sellers, like FFestiniog travel or perhaps also others. I guess/probably as long as their stock of paper passes last. They probably also tack on a little extra handling fee.
In the UK/GB sale of such international tickets on special stock must have ceased many moons ago. Probably around when BR got fragmented in all these newtime modern commercial companies.
ALT: some national railways here on the continent also still sell paper passes right over the counter when asked for. Best known is DB/Germany, but also SBB and OeBB and NS (only 4-5 major stations, incl. Schiphol airport) and NMBS/SNCB-and likely also most SNCF (probably also as long as their stock last-they are doing a big turn toward even scrapping any paper and ask for your @mail etc.). NS charges 7,50 extra for that honor, DB nothing. So you might contemplate flying into some major airport with station and start from there. I do not promote anything nor will tell this is very wrong for train-users-only give you a do-able ALT. With some shrewd planning-and luck-that flight might even cost a little less as only the supplmt/reservation for that €* to get out of your island.
I can happily vouch for digital. I'd staunchly stuck to paper for a while but caved last year.
Staff on the whole are friendlier and seem to have a better idea of what they're dealing with when you show them a QR code on your phone. All will scan it and they're happy.
I've had staff in Czechia, Hungary etc feign ignorance, stamp over things they shouldn't or even attempt to tear the pass in half.
Back on topic, My Interrail (basically NRE) is the only UK retailer. But basically, don't be afraid of the electronic version. Its fairly reliable (odd bit of lag) but staff much prefer it and will at least know what you're showing them.
Saw this after I had finished above. Both can also be added with opposite.
On community.eurail are several complaints from users that in some countries (with very low fares, where using a pass will cost more as just buy a ticket) where that QR-code cannot be read, staff simply say it is not valid-and force you to buy a normal ticket at higher price. But in Spain and Portugal they also cannot read it and there all staff I met very well knew to swipe and see the trips you have listed.
Have used through the yrs some 10-11 paper passes (was a little too old in the start for it) and never really encountered such handling as described above. Mostly enthousiast welcome and friendly talks.
The major grumble are the ever increasing nr of hard to make reservations/supplmts-much more as in the past. Most pass-users tend to stick to well-trodden major lines. It seeems most asked for is since last yr the few direct TGV Paris-Barcelona. And yes-these are hard to get.
