An older friend of mine has a collection of LPs and a pretty decent turntable, amp and speakers.  He was interested in playing some cds he had been given so I found a Sony DVD player which also plays cds and got it for him.  The player cost $33 in 2021 and now goes for $44.  https://www.amazon.com/dp/B007F9XHBI .  It's not a top quality device but it worked pretty well; this indicates that the cost of entry for working with cds is pretty low.  Most PCs will play CDs no problem...

Yea, I don't see that a CD comeback is in the cards.  They will be collected by some only as artifacts, and the huge supply of many of them will keep prices low.  With LPs, you have analog sound that some people still value, as well as attractive packaging.   With the capacity of hard drives and computers so high, CDs no longer have much value as a storage of sound.   People can talk all they want about their perceptions of "real product," but the bottom line is that real product is sound in this case, plus information that can also be digitalized.  

They don't really do extra material now. They are doing mostly LP reissues. They have only been releasing what was on the original LP unless they decide to go with a "complete" version. like they've done with a few sessions like Trane's "Blue Train", Rollins' Vanguard or Burrell's Five Spot material.

I just don't see this in my area. CDs are dirt cheap and plentiful in every store I go into. If they were gaining any traction, I doubt I would see so many rare CDs sitting in these bins with $5 price tags on them. I guess you could say that Jazz CDs are rising as a way for someone to acquire a large collection cheaply, but that doesn't seem to be the way it's going. FWIW, the argument that today's younger music fans aren't willing to buy equipment and have an actual stereo setup doesn't hold water when you consider that they are also the generation that has supposedly caused a resurgence in LPs.