Yes. I think if you get 'fresh' and legal brw these days, for instance, it's harvested from stumps of trees that were logged long ago; reclaimed; or 'nos'. Of course, logging is still a big problem globally, so some of it might get through the proverbial cracks, I don't know. And there are other exotica which are similar but not listed, so builders end up going with what customers want.
It's interesting also that Torres, the father of the classical guitar, used reclaimed wood for a big part of his output! Most of his guitars do not have bookmatched spruce tops, and several have more than two pieces. He understood wood and how to get out of it what he needed, he wasn't always worried about aesthetics (though he build some visually stunning guitars).
Yeah. Some people still use pegs if they have a vintage guitar or for a vibe (with the planetary gear pegs) but most people use regular ones these days.