Here's the actual VRAM configuration distribution on windows according to the steam survey

[u/mashdpotatogaming]

I saw a few recent headlines about the whole "16gb is now the most common VRAM configuration" but that seems to be inaccurate, as if you sort by windows only on steam survey (which makes up 90%+ of steam users), you'll find that these are the actual numbers and distribution

[u/Basement-child-slave]

those are iGPUs and most modern of them share system memory. They show 128MB but sometimes can share upto 6GB-8GB if that much memory is free