my only problem is my 1080 has 11....why would want 10 when it can be cranked to 11 or more?
I would assume because they plan on doing a 3080Ti with 12GB. There are solder pads on the board for 2 more RAM chips. So my guess would be that some time later in the cycle they plan on introducing a Ti that has 12GB of RAM. Hence 10GB for the normal 3080.
Cost could be a factor too, I know this new RAM is supposed to be expensive so maybe they need to keep amounts down to keep their costs reasonable, but I would imagine it has more to do with a later Ti than anything else.