Depends on the public transport network where you live. I used to work with someone who commuted from London to Cambridge (yes, that way around). And in Berlin, someone else who commuted from half way to Poland.
Won't work everywhere, e.g. from what I saw when visiting I don't foresee US cities rapidly integrating enough good public transport to properly replace cars within themselves, and from what I've heard about how municipal organisation works in the US even less so for a convenient and well integrated intercity network, but it can be done.
halfway from Berlin to Poland is like a 30 minute ride on regional train. It's quite close to the border.
It's also 100 km to the border. The point is, we actually have trains (and busses) that can do this here. It's actually possible.
I visited Davis CA few times around a decade ago for comparison; Go to google maps, choose public transit, and use Davis as an origin or destination while dragging the other end around and see how many routes it can even find.
The rate of successes I get in the Sacramento conurbation are about the same as the rate of success I get for rural Brandenburg, but for most of the rest central Valley (with a handful of exceptions), Google mostly couldn't find a route at all.
By this measure, California's central valley is worse-connected for long-distance public transport even than rural Wales (measured by "can I route-find to Aberystwyth?").