Middle aged dude. Being frugal has paid off.
For any younger people trying to be frugal: it works. Although it's harder for younger people as everything is stupidly expensive, which sucks, but everything always gets more expensive.
I have a reputation for being "cheap". It's somewhat undeserved, I'm pretty generous, like if I invite anybody somewhere: will cover the drinks and food.
But drinks and food don't amount to all that much. Read something about "lifestyle creep" decades ago, and if you avoid it: you should be good. Get to where you're comfortable and happy and stop there.
Buy a house if you can, and spending money on it just your assets. Like if you buy a new driveway or garage or something for your house, that's not really spending money, it's just making your own thing more valuable. This is pretty obvious, but hey.
The best thing I ever learned about money was to avoid lifestyle creep. You get to where you're OK and stay like that for as long as possible without upgrading as your salary and wealth increases but your expenses do not.