Well, for instance, Call of Duty Black Ops Cold War uses roughly 15 GB VRAM with official HD texture pack installed. And that's not even 4K. Trust me, 10 GB VRAM may be enough for now but late 2021 and beyond not so much.
Considering you've spent nearly $1200 on a new graphics card, you'd want it to have at least 12 GB VRAM.
A quick look around the web and you'll see countless leaks about a 16 GB variant of the RTX 3080 Mobile which Nvidia is going to unveil alongside other RTX 30 mobile GPUs on January 12, two days from now.
Now 3080 Ti is what interests me the most, though I fear the price might be too high in these times. But I got a feeling things will settle down a bit later in 2H 2021, fingers crossed!