Yes and I loved it. I decided to stop flying shorthaul about 7 years ago and have used trains for most of my travel since including some sleepers. I once got the train from Edinburgh to Carcasonne, which was a really lovely, albeit quite long day,
However, I had a really bad experience travelling to Germany by train at the tail end of last year and it's made me very wary. German trains are pretty terrible. I was there for a week moving around and only one train the entire week was on time/ not cancelled. When I got back all my German friends and colleagues told me this - I obv hadn't done my research properly as I'd expected it all to be OK and ended up with lots of missing connections, and a difficult trip with loads of changes with an inadvisable wheeled suitcase. Had i known how many changes I'd need to make I'd have taken my eagle creek convertible bag - rucsac to suitcase which I love, but had thought was unnecessary for a trip with very few changes.
Have had positive train experiences in France, Belgium, the netherlands, switzerland, austria and Hungary previously. Sometimes I take my Brompton too for ultimate travel flexibility but that needs careful luggage planning.
(Typing this out has made me realise quite how stupid my reaction to a couple of bad journeys has been!).
The next trip I was planning was up into Scandinavia by train from London.
I don't use hostels anymore and tend to stay in basic hotels. I'd suggest getting some brand loyalty if you do this as the perks can rack up if you travel fairly frequently.