Slint is proprietary though, so that’s a dead end. I’m not going to use something which will inevitably be rug-pulled when you sell to private capital.
Btw, a rug pull can happen under even the most permissive licenses. As we've seen in the past with some project changing license or direction. That's more or less already happened with GPUI when Zed refocused development on its own needs rather than other GPUI users resulting in several forks.