That's a real good point!
Unfortuatenly, my CPU (5900x) doesn't have an iGPU.
The last 5 years iGPU got a bit out of trend. Now maybe they actually make a lot of sense, as there is a clear use-case which involves having dedicated GPU always in-use which is not gaming (and gaming is different, cause you don't often multi-task while gaming).
I do expect to see a surge in iGPU popularity, or maybe a software improvement to allow having a model always available without constantly hogging the VRAM.