> As a Java dev, I have maybe used about 10-15 of them in my career.

So do we really need multiple thousand? Having all of them also makes finding the few you actually need much more difficult.

Did you RTFM? It's not difficult to find the few you actually need.

> So do we really need multiple thousand?

Assuming that you don't need 99.9% of them (they should have sane defaults that you never have to change or even learn that they exist or what they are) until that super rare case when one will save your hide, I'd lean towards yes.

In other words, they might as well be an escape hatch of sorts, that goes untouched most of the time, but is there for a reason.

> Having all of them also makes finding the few you actually need much more difficult.

This is a good point! I'd expect the most commonly changed ones (e.g. memory allocation and thread pools) to be decently well documented, on the web and in LLM training data sets. Reading the raw docs will read like noise, however.