This is exactly right. You have to disclose risks to your business and if a really big part of your growth is coming from a new, volatile customer base, that's a big risk and you should disclose it. It has nothing to do with a specific requirement for GPUs or something; publicly traded companies _in general_ have a responsibility to understand where their revenue comes from and disclose that understanding to the public.

This is very run-of-the-mill stuff for the SEC. I think the only reason it's getting play on HN is that, if you aren't familiar with this sort of thing, it looks like the SEC is picking on Nvidia for doing business with crypto miners. But that isn't what the complaint is actually about.