Well, I thought this was pretty terrific, and I'm a little sad to see some of the comments.
I don't think it's a "very expensive mid-life retirement", to echo and paraphrase much of the criticism here. Yes, it could be, but it also doesn't need to be. Instead, it's about a mindset which says - I'm ok with going this far but don't feel the need to go a huge lot further.
We spent the weekend with friends. She is high up working for some US corp, doing maybe £250k a year. He's in something to do with governance that I don't fully understand, on maybe £150k+. They live in a stunning house, they have insanely busy jet-setting type lives, they have two small kids, two expensive cars, endless holidays abroad, several flats that they rent out, all the trimmings.
We had fun seeing them, and dipping into their life - but on the whole they seem to spend their lives being stressed, busy and not very contented.
My wife and I spent the journey home thanking our stars for our much simpler, much less glamorous, much (financially) poorer lives. We live by the sea, we have raised our (now late teen / early twenties) kids by choosing to be present, and this has come at the "expense" of our careers. We've run a small business working with non-profits for 15 years where we deliberately (in order to keep a sense of life balance) choose not to grow. My wife started a floristry business because she wanted something beautiful that was hers, but she has no ambitions to make it into something enormous and unwieldy.
We're in our late 40's / 50's - so I guess we partially fit the criticism, although we're far from retirement (lolz, not nearly enough cash to do that!), but on the other hand - we've always chosen to live like this. We had brief flirtations with big jobs in our mid-20's, and we had some hunger to climb a little bit up the salary pole early on, but we've both always been in and around non-profits and we've never had ambitions to be hugely wealthy or hugely successful, or hugely anything really. We just like ticking along, doing what we do, seeing some friends, writing a few songs and looking at bits of art along the way.
I do fully accept that there is a whole level of shitness in environments in which you have to hold down 3 jobs in order to make ends meet, and I also feel that the current environment is pretty scary for kids just entering the job market or at the beginning of their working lives. I'm under no illusions: I've been pretty lucky in my personal and working life. But I've also made this journey making quite a lot of conscious decisions that I think can be chosen (if you want to choose them!) along the way, not just when you're older or luckier or more comfortable.
You can sometimes choose (for example) to buy second hand, or to try not to take on debt, or to go for jobs that give you a better balance of time vs money. You can choose to do things cheaper. You can choose to be happier with less. You can choose experiences over objects.
Having no money is awful. But having a massive ton of it with all the complexity it brings - that can be awful, too.