Many thanks! This one took a lot longer than the last one I did, partly because of now having to cover Intel too, but mostly because none of the three vendors did a great job of saying much about their new architectures.
Compared to the RDNA 2 launch, AMD provided relatively little detail, so rather than wait for the next set of developer docs to be released, I had to sift through a whole raft of other material, doing a fair amount of cross-referencing, to fully understand all of the changes. Even then, there's still quite a bit that's relatively unknown about RDNA 3.
Intel actually provides quite a lot of detail but it's a mammoth task hunting it all down and comparing the varying sources to make sure one isn't outdated or the like. The full architectural details are still somewhat murky, such as the load/store system.
For Ada, Nvidia actually said remarkably little, compared to Ampere and Turing -- most of the focus was on DLSS 3 and its related technology, which isn't surprising, of course. Mind you, they still don't say a lot about the insides compared to their much older architectures; even with a developer account, it's like trying to find a needle in a planet-sized haystack.