Traditional URLs pose real problems for NFTs. The owner of the domain could redirect the URL to point to something else (leaving you with, perhaps, a million-dollar Rickroll), or the owner of the domain could just forget to pay their hosting bill, and the whole thing disappears. The animation that Grimes sold for $389,000 is
primarily sourced to a pair of traditional URLs, which could break down if either of the two different companies (Nifty Gateway, the auction site; or Cloudinary, the web host) went under. As the buyer, this is something you’d have no control over, unless you’re wealthy enough to buy out the entire domain and pay to keep it online.