Check out IPFS, this is already happening in the NFT world. Have you noticed how all NFTs are high quality and not compressed to shit? That's because of the IPFS.
I saw it too, and IMO the ecosystem is better than ever now. It took a few years of stagnation for SF to really dig their hooks in, but everything is nice and integrated now.
The point that they didn't raise is that scrollbars effect the size and position of things in the browser. Try setting 100vw on an element when you have obtrusive scrollbars, the result will be a page which now has horizontal scrolling, leading to terrible UX.