You are right. Lot of people traveled in 20th century. But a lot more could have traveled if there was Internet in 20th century. Internet has reduced the friction to travel abroad by a lot. You know more about the world now. You can plan travel and book flight tickets, hostels and bus tickets in multiple countries by not even leaving your room from a small city in India.

> What's the difficult / tragic experience one has in a different country if they don't have constant internet access or GPS?

hmm. I think having an Instant access to Internet is like a super power. You feel more in control as well as save a lot of time. Some examples

* Finding exchanges that gives you a good rate in a new country. Lot of exchanges just rip you off and sorting by negative reviews will help you a lot.

* I think Google maps is pretty helpful especially if you are on a tight schedule. I had to get a bus late night in Budapest and had only 1 hour to reach the bus stop from hostel. I am pretty sure I could not have reached the bus stop on time if it was not for Goole maps. The maps told me that half the train track is not working because of maintainance and I have to get down at station X and start walking. There were hardly anyone in road at that time and it would have been super scary If I didnt have Google maps.

* You often need to use an App to unlock a rental bicycle. Ofcourse there are other ways to rent a bicycle but this is much more convinent and acessible.

* Need to contact emergency services but dont know/forgot the number.