The smaller the price-point target,

the bigger a chunk of it that each embedded component eats.

The markup/licensing for the GPU in a little device can be a significant percentage of that little device's potential-profit-margin.

Same as a $6 markup isn't significant on a $1000 thing, whereas it IS significant, when the target-price is only $10, and now you're left with $4 for all-your-contribution.

I've discovered that the good heart-rate sensors cost in the $30 range, whereas the shit ones are much much less.

So, if I were to put into production a fitness-trainer that used the proper equations, & didn't do any spying on people ( as Fitbit & smartwatches do ), then I'd need to .. either create a shit product, or bite the bullet & get the good sensors.

I can't afford to create my own sensors, see?

Maybe Sega can afford to make their own GPU.

Do keep in mind that there already has been a opensourcehardware GPU, iirc, some years ago ( shit performance, but if it's public-IP, and it can be significantly-improved-on, then it's possible )

https://duckduckgo.com/?q=opensource+hardware+gpu&t=fpas&ia=web