@Redfuchs completely skips the 5090 lol

But yeah, I'd probably recommend 16gb+ now just because on the mid/high end a good 16gb card isn't very expensive.

More doesn't really lead to better performance for most tasks, so I wouldn't recommend it unless the price is right, or it's a productivity issue (eg: I can't edit video/render/etc fast enough to make more money, deadlines, etc).