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.
I generally like GN, but this is hardly crystal ball gazing! Show me any gfx card that you can't apply these two sentences to.