Will likely depend on the game, I just tested Horizon Zero Dawn which has some nice crispy graphics, At max settings 3440x1440 I saw an average VRAM usage of 8400MB so I can see people hitting the 10GB limit fairly quickly if they run new games over 1080P, I know VRAM allocation is also a thing but I cannot see 10GB lasting very long for anyone who plays at any res over 1080P for long.
hmm interesting. After our last 10gb future proof debate with Alien et al, I tested this game on my pg348 with the 2080ti on max (since we were also discussing bad ports and bad launches). I only peaked at 6.8gb. Wonder if allocation is also dependant on AMD vs Nvidia? :S