It depends, I’m not sure if it’s a binning thing and they can’t make enough perfect chips for the 3090. Or it might just be limited memory, they’re using all the gddr7 that’s being made and that’s with many different suppliers.

There are some small regional places

It’s parallel unlike a CPU, so there isn’t anything inherently wrong with just scaling the chip up in size and power. It just makes your room hot if you have the xx90 on at full blast for hours.

This is still basic research, it’s not close to commercialization.

That by itself isn’t terrible, that could still be used if it is sealed in something like an era brick if it’s good enough.