most pre-built home PCs, office machines, virtuals, etc.

I mean, unless you're a gamer or do certain niche work... why would you need a "proper GPU?"

Those have been good enough for a while now. My late 2013 MBP worked fine until last year, when I stopped using it for unrelated reasons. It had an iris something, and IIRC that CPU wasn't even brand new when that mac model came out.

Sure, I didn't play games on it. But for regular "office use" I never had any performance issue.

For my current laptop, I specifically wanted a model without a dedicated GPU. Didn't want the hassle of dealing with that (I run Linux) and also there was no reason for me to pay extra for something I don't need. It was cheaper for me to buy a dedicated GPU for my desktop.