Open weight models challenge the "winner takes all" hypothesis, which motivates the astronomical valuations and acts as a justification for trains of cash dumped into AI development.

In other words, if AI models become a commodity, the "AI leaders" will not be able to burn the cash like they do today, thus resulting in a "slower" (one could say instead "more sustainable") development of AI models.

Here's his original post https://x.com/i/status/2078133895766114412

It's a copy/paste of the arguments against open source software from decades ago. The argument goes: innovation requires profit motive, and profit motive requires IP rights. Of course, this was soundly disproven in software and I don't see any reason it should be different here.