A lot to digest there. These are set to launch in 30 days. While the 10 core part may see some limited availability and mark up, I can't see the 4,6, and 8 parts having a problem. My excitement were for those parts anyhow as they are much cheaper than the 8th and 9th gen versions. While early Z490 boards are looking pricey, board manufactures will still compete for the mainstream market.
Both Rocket Lake and Zen 3 may be further away then rumored, so if you want to build something now, Comet Lake is not a bad option.
Not sure why you threw in the 10980xe in a conversation about desktop parts. Not really sure what generation of Pentium you are talking about - I'm guessing it was during the Bulldozer years.
For the same reason a sudden growth in demand left the Pentium G4560 missing in action for it's first twelve months of retail. All because they added Hyperthreading to a dual-core!
G4560 mostly out of stock 3 months after launch:
G4560 mostly out of stock 6 months after launch:
Just because you can keep up with demand now, doesn't mean you can handle the sudden spike in demand when you give away a feature you've locked down for the last six years.
It took almost 12 months for that surge in demand to be sated, And although the Mining Boom is over, I would still expect the surge to last half as long (3-6 months), because they're releasing TWO chips based on the same die with HT now!
the 10980xe was thrown in just to highlight the fact that Intel has a long history of not meeting demand, and if their latest chip is still MIA after 6 months , it's going to be the same story for this 10 core.