Looks like stock for the 3080’s should be coming back next week, Wednesday for a few stores with availability of the 3090’s already improved. 
(That particular GPU is a little costly though. 
)
Picked up a 6800 non-XT two days ago, was hoping for a XT but there’s no estimated date on when stock is available so a batch of MSI references available with for some weird reason reference pricing instead of the markup going on well figured might as well go for it.
Solid upgrade alright, various improvements on how the 5700XT (Pulse) worked too respecting the fan settings better for one big improvement and scaling better in terms of clock speed and not being quite so dependent on overall GPU load for this plus it respects minimum (3D) clock states now.
Bit above the 3070 and at a slightly lower price though once pricing normalizes the 3070 should be cheaper and reference 6000 AMD GPU’s should be going EOL in Q1 2021 sometime should already be out of stock but AMD made more due to demand.
6800XT’s another 10% to 20% depending on the title and particularly for the better scalability with D3D12 and Vulkan, about the same for the 6900XT from that.
Clock speeds can be set up to 2400Mhz GPU 2100 Mem with the default 15% power limit hard cap. (Forcing higher sets a 565 Mhz GPU clock speed.) making for another 4% gain or so which isn’t bad.
Then just dialing in voltage and getting the fans and such for the extra heat since the reference 6800 is a 2 slot bit different design and components from the 6800 and 6900 same Navi21 chip though cut down a bit but the bigger units have a higher default total board power limit and a higher voltage with a 2.5 slot cooler which is also a bit better at dissipating the heat.
Cap of 2800 Mhz for the 6800XT and the same 2150 RAM I think but 2050 to 2100 is usually where it’s at above that ECC might kick in and you lose a small bit of performance instead although the full 2150’s possible depending on overall binning and all that as usual.
Softmodding can get the 6800 to hit around 2600 GPU core clock speeds but 2450 to 2500 is more common and then it might hit stability issues, 2700 seems like it’s common for the 6800XT and 6900 both though the full Navi21 XTX 6900 GPU core needs some better cooling to maintain this.
(Massive Merc319 or what it’s called might not be required but the custom designs will certainly help solve that even if the reference design is a lot better over the 5700’s with the ineffective blower cooler.)
EDIT: Don’t really have to fiddle too much with it, there’s some neat gains although not the biggest from clocking it higher and as usual you can undervolt these and it just gets really effective at 0.850 to 0.900 but losing a bit of performance from reducing the GPU core clocks at least a little bit.
Solid improvements overall really, shame about the price situation and the availability especially the hugely popular NVIDIA Ampere 3080’s though AMD’s 6800XT’s aren’t all that common either and the 6900’s will likely be smaller batches of availability to begin with unless it sells out immediately again. 
Zen3’s or the Ryzen 5000’s are also stocking up though more for the 5600 with a few 5800’s though a couple of hundred should be in stock as of early January but the pre-orders for these are also really high so that’s going to resolving these first I would expect but some stock might remain depending on how many on total are being sent over here and of course the rest of Europe as well.
Less of a hike-up in pricing too but there’s still a bit of that going on though at least for what it seems to be currently less extreme than the GPU side.
No idea as to the state of the 5900’s and the big 5950 CPU probably going to be some stock at least but I’ve only seen listings for incoming 5800’s for this last week of December or early January.
EDIT: Oh and the bios and AGESA situation and updates, MSI’s rolling out some early 1.1.9.0 bios code already Asus and Gigabyte and the others should hopefully follow in January and if AMD doesn’t revise it further that will hopefully resolve the ongoing problems and compatibility issues from AMD’s side and the AGESA code and these bits.
(New version of PBO2 too which combines PBO with the curve optimizer for voltage and clock scaling fine tuning, nice little extra to have.)
EDIT:
Nice, Asus listing a few 3080Ti’s early.
. Your texture pack doesn’t have any problem, but if I tried to inject some 6GB of textures then the game runs at 5fps 