Sounds fun, but I wish there were more people who'd invest in making Firefox's Gecko more easy to use (stretch goal: revive Proton, which is Electron but Firefox) instead of pushing a ton of effort into inventing a new thing.
That said, this is coming from SerenityOS (specifically, the founder and basically the entire community concentrating on building its browser instead of hacking the OS, resulting in a split), so I understand that it might be a lot harder to port large codebases to a new OS instead of than starting a new one.