I know that in the past (such as your mentioned 15 years ago) Intel GPUs did have driver issues.
> It is quite telling how good their iGPUs are at 3D that no one counts them in.
I'm not so certain about this: in
> https://old.reddit.com/r/laptops/comments/1eqyau2/apuigpu_ti...
APUs/iGPUs are compared, and here Intel's integrated GPUs seem to be very competitive with AMD's APUs.
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You of course have to compare dedicated graphics cards with each other, and similarly for integrated GPUs, so let's compare (Intel's) dedicated GPUs (Intel Arc), too:
When I look at
> https://www.tomshardware.com/reviews/gpu-hierarchy,4388.html
the current Intel Arc generation (Intel-Arc-B, "Battlemage") seems to be competitive with entry-level GPUs of NVidia and AMD, i.e. you can get much more powerful GPUs from NVidia and AMD, but for a much higher price. I thus clearly would not call Intel's dedicated GPUs to be so bad "at 3D that no one counts them in".