Yes. That's why I don't answer a lot of questions.

Felt like I hit the wall back when I was super active on Q&A sites. Think it was around the 600 question mark.

Normal for any Q&A sites

You can repeat anything sensible in the hope to find ever new people to answer them?

inb4 "there are no such thing as stupid questions"
yes, the set of semantically valid questions is greater than the ones with are meaningful, that's just how languarge works

Not really I don't think so

Yes, there's only so much information that's deeply pertinent to our lives, our interests, etc., because the complexity or breadth of those things (at least as far as we conceptualize them) is limited. I think you can ask an unlimited amount of questions, because there's no end to how obscure and detailed information can be or its contexts, but when it comes to good questions they're limited. I'm sure there are thousands of good questions, though, if you take all areas of interest and application that impact someone in some way.

Very

only by our imaginations