The biggest benefit to this is that it makes one of the slowest parts of virtual DOM diffing (longest common subsequence) no longer required. After this becomes supported in the mainstream, not even signal-based frameworks will have to include VDOM algorithms. I know this because I remember pushing for this to be supported a few years ago — a nice reminder that the standards are evolving and that nothing stops you from being a small part of the effort.
Next up — DOM parts and standardized signals, unified.
Next up — DOM parts and standardized signals, unified.