Eh, I'd say a 5000 series would be a worthwhile upgrade if you're still rocking a 2070, but
If 16 GB of VRAM isn't enough for you, then you're dead in the water because more VRAM than that is either the 3080 Ti 20 GB variant (I didn't even know/remember that existed) or x090 cards.
In one way yes, you're right, but I do not have the money for a $1000 card every year. I need 3 years out of this card, and I feel that when it is only 15% faster than a 4070Ti Super, then where is the value?
There are games right now that can't run at 60 fps at 4K. I know there are games coming this year that will struggle to run fast on what the 5070ti is going to be, so it feels like a bad investment right now.
I have no issue with a xx7x card only having 16GB of VRAM this year, but the xx8x only having 16 is a problem to me, as it it offered 24GB, it would have been a day 1 purchase, but as it stands, 16GB offers no longevity whatsoever, a year at best.