The funny part of this is, you just described not only travel, but all of life prior to about 2003ish (at least in the United States). This is when, in my social circles, we transitioned to most people having cell phone access and the ability to "let people know if you would be late." Still a long time before smart phones became ubiquitous.

So this was "just life" in the 90s and beforehand. The upside you describe was also sometimes the downside. E.g. my mother was traveling for work when one of my brothers was injured in a way that required a trip to the ER for stitches (he's fine). My dad was getting us all (4 kids under 7) into the car as she called from her hotel and he basically had to answer and say that we were on the way to the hospital, and she just had to wait for an update once we got home many hours later.

And yet, I would still agree that "Life felt slower, but somehow more real?" and that we haven't yet found the right equilibrium for always being connected in a way humans were never able to be before. I'm glad experiences like this are still possible.