My experience echoes the journey @bookmama22 had in the early 70’s. Really $5/day. My 2 month railpass cost about $200 and was unlimited 2nd class. The train cabin seats would slide down to form one large sleeping space and at night we’d all unroll our sleeping bags, strangers, all young. For a while, I traveled alone (female.) Sometimes, getting in to a city the first thing I’d do was check my large back with the baggage folks, then have a look at the late train schedule out, pick the next target based on a long enough overnight trip. Either on the train or at a hostel, I always met other kids to hang with, share tips with, trade paperbacks, maybe share a cheap pensione. Sometimes, that lasted a few days. (At that point, I didn’t speak German, so it came in handy to meet two guys, one of whom was fluent.) I read a lot, saw a lot of museums and historic spots, had a blast. Somewhere, I have the diary.
The book info was current- and comprehensive. Things worked. Many of the cheap places to eat were where locals went, not much English. I had a sense of relying on myself, defining my own adventures- and trusting others. Best hostels: London/St Paul’s boys choir dorm. And one in Germany, where they served Beef Wellington for dinner. They all had us out by some time in the morning, after some chores, let us back in later in the afternoon, and locked the front doors around 11pm.
When D1 was first in Europe, a few years ago, I strongly suggested she do hostels, too. And she had a fabulous experience, met kids and young adults from all over the world, some she is still in contact with. Of course, things have changed a bit. Her hostel in Barcelona was open 24/7, had a front desk fellow on duty who’d call taxis, would recommend the best clubs, etc. I think she paid about 17/night for a dorm-type room.
I still don’t understand when people insist on a top end hotel chain- that has its times, but so many experiences and memories come from a more casual approach. And traveling light.