Don't disagree with any of that. Also why I think OP should stick with 3080 for the money - a 3090 isn't hugely faster for games, and the money saved can go potentially towards an upgrade later if required.
Gives the potential to get in right at the beginning of the upgrade cycle, and if that happens a scalping is an issue, the 3080 will more than likely retain a higher percentage of its value. If they can't get a 4xxx/7xxx cars at the beginning, they are still sitting on a more than capable gpu with no games on the horizon that look to destroy it.