To clarify on timescales, the understanding is that the review embargo will be lifted tomorrow (16th) so we'll get test results from a wide variety of sources. Most will probably be gaming focused but I hope there's some compute in there too.
3080 sales start on the 17th, although I'm not sure if there is a specific time for that. Same time worldwide, or varies locally? There are rumours of shortages, but impossible to tell if this is just the usual more people wanting to buy than can be available at launch, or if there is a deeper supply restriction that will take longer to resolve.