Yeah, I've been looking around and just finished watching the latest Moore's Law Is Dead video. I think I may have been influenced a bit by the 'look, new toys!' excitement hype. Sounds like the 5800X3D is going to have limited availability and priced to the point where it might as well be a paper launch. I mean, AMD pitched it as an opponent to the 12900K, but if they price it higher than the 12900K and you're going to have to get a new board for Zen 4 anyway, why bother with the 5800X3D?The trouble is that Zen4 will require a new AM5 socket motherboard. So given the current situation and what they announced at CES, putting in a new CPU will be limited to the existing range and the forthcoming 5800X3D.
Then again that hopefully means a lot of people will be able to cheaply upgrade their current gen CPU or whole system when Zen4 does come out, as people who want Zen4 will have to buy new kit.
Anyway, if you're already on Zen 3, then you're frankly in a good spot already and should just enjoy it. Alder Lake may be better in certain aspects (depending on your needs and what you value), but that doesn't mean Zen 3 suddenly turned into crap overnight. Biggest issue I see with Zen 3 right now is pricing. Zen 3 CPUs are just too a bit too expensive in my country compared to Alder Lake. It's only because Z690 boards are expensive and there's a good chance you either have a compatible board already, or can easily find a very reasonably priced one, that Zen 3 still holds up. However, now that we have more info on the 12700 and B660, I’m not sure Zen 3 can stay relevant if Intel opts for a slightly competitive price. Time will tell.