How will the 3080 10gb run in the future?
tldr: it will be fine if you keep playing old games, well yeah.
But if you kept the card and played future games, you can look forward to frame time spikes, lower overall performance, tons of texture pop in, games being unable to render target textures without noise.
Gamers nexus observed several newer games running with lower quality textures, noisy textures and texture pop in on the lower VRAM card even at just 1080p. This issue was particularly apparent in
Horizon Zero Dawn and Cyberpunk 2077
I put HZD in bold because thats the game thats been reported to adjust its image quality on VRAM limit and 3080 fans have been trying to downplay the people saying they get better image quality at 4k in this game by moving to higher VRAM card. Well now you'll have to downplay Gamers nexus too.
And yeah none of this will matter if you are not playing new games at high resolution or are just going to upgrade to the 4080 and then 5080 - not everyone will upgrade every generation though