Is it not possible for NVIDIA to make VRAM extensions for other PCIE slots? Or other dedicated AI hardware?

Is it not possible for NVIDIA to make a new (or old idk) kind of hardware to just expand your vram?

I'm assuming the PCIE slots carry the same data speeds but if this is not possible at all, i will ask could NVIDIA then make a dedicated AI module rather than a graphics card?

Seems like the market for such a thing might not be huge but couldn't they do a decent markup and make them in smaller batches?

Just seems like 32gb vram is pretty small for the storage options we have today? But idk maybe the speeds they operate at are much more expensive to make?

Very curious to see in the future if we get actual AI hardware or we just keep working off what we have.