It depends what makes you tick, and how much you care about a particular thing.

If you like learning a lot of superficial to mid-level information about a lot of things, diving too deep will naturally result in a loss of enthusiasm, and that’s ok. You only have so much energy for each thing to take.

But if you really enjoy doing a deep dive into one or two things, more extensive knowledge is the best reward for the effort, so it’s a self-reinforcing cycle.

I’ll never be the latter person. I’ll never know all the lore for anything, or know every model of machine or whatever. That’s not what makes me tick. I do tend to get bored when I know too much about a thing and learning more means engaging other people’s thoughts (books/media), or using math, or whatever boundary I don’t feel like crossing. But that’s ok, my enjoyment is from knowing a lot about a lot, not from knowing everything about a few things. Which is also ok.