There’s a bit of a snag with this. Chip designs are rarely ever done from scratch. Instead they’re iterated over many years, similar to how browsers, operating systems, other critical software is developed. It took NVIDIA decades to get where they are now. If anyone else can just take their designs as a starting point then NVIDIA’s whole investment (billions of dollars in R&D over decades) ceases to be a competitive advantage.
I think what would actually end up happening is that chip design as NVIDIA is doing would cease to exist as a business. Perhaps we’d end up with something more akin to an open source model like Linux. But then cost of manufacturing (paying for the masks and order startup costs) would still run into the millions, and TSMC would hold all the cards.
The reason I brought all this up though may have been missed by all the commenters to my original post: the U.S. government and their strategic interests. Having American companies like NVIDIA (and Apple as well, really) lose power and marketshare is not in the interest of the government. The last thing the US wants to see is for China to close the technology gap on this stuff.