Its probably worth noting that I mean "enough" in the context of consumption and physical goods. "Enough" wealth doesn't really matter, its only a number in a database or a piece of paper until you spend it.
So what was the point of him living a frugal, simple lifestyle? I would argue that its just something he was used to and found joy in, and thats ok. Some people like that. Others might want to use their money to unlock new experiences that come with it. Thats ok too.
Does this ultimately come down to Taste?
It is hard to judge what is enough. While a Civic is a perfectly good car, it certainly isn't the safest, nor does it have the best riding experience. Once you get into attention to details, what is "enough" often means mediocre.
I want "good enough" from a crazy perfectionist. Like Steve Jobs' Apple.