My parents retired in their 50s in the early 2000s - mom a teacher and dad a factory worker and they are doing well.
I'm about 50 miles outside of Boston/Cambridge and have easy access to all the shopping I care about and even driving into the city for theater etc. isn't an undue burden. Between myself and a couple other neighbors we're on about 75 acres and adjacent to conservation land.
But, basically, while Bay Area CA is complicated (because of the geography) you can generally get away from walking to things in a city and there are a lot cheaper options in other cases. Lot of exurbs even around generally expensive cities--and even when lots of companies are out there as well.
Probably shaped by Bay area narratives, a lot of people assume that you're either living in the city or you're living in some remote rural location.
As empty nesters, at 51 and 50, there is nothing interesting about rural America. I’m in South GA now visiting my parents with my wife. They spend all of the their time between yard work doing things around the house and church. My cousins who still live here and their lives are just as boring - unless they go out of town.
(For what it's worth - I myself am a city guy, but only because that's where I grew up in and have spent all my life. A town of 100k people feels desolate for me on Sunday evening, but I also don't live with family.)
When I was single and younger, my hobbies were teaching fitness classes around the metro area and participating in group charity races with friends. We use to do one every month.
I do find it a tiny bit offensive the idea that kind of thing is boring because it's not your hobby. I live semi rural (not America) and gardening became a hobby, there are garden shows etc.
Everyone has the same amount of time to fill every day. When it comes to "things to do" I don't really see one optional lifestyle as more fulfilling or hollow than another. I could live in a city, which would open more options, more than I could possibly consume, but at the same time it would also constrain my resources so I wouldn't be able to do as much of one thing.. or have a big garden and a studio for painting.
I would be fine here as a married man. But I can’t imagine being single here instead of my two times being a single adult in Atlanta (22-28 and 32 through 35).
I “retired my wife” at 46 halfway so we could travel more (I work remotely) and halfway so she could pursue her hobbies. I would be okay here because most of what I do is on the weekend and there is an airport here that has two flights a day back and forth to the Atlanta Delta hub. She would absolutely hate it.
My resources were far from constrained making even $150K before 2020 living in a 3200 square foot house I had built in the northern burbs of Atlanta for $335K in 2016.
They are a lot less constrained now though making in the low $200s in state tax free Florida living outside of Orlando. That 200K is nothing to brag about in tech. As o said before that’s what a former intern I mentored at AWS is making as a mid level SA