This will be great! I was just working on an app where this exact pattern would have been useful. The app mixes serverside html with some sprinkles of React fo

This will be great! I was just working on an app where this exact pattern would have been useful. The app mixes serverside html with some sprinkles of React for a checkout flow. Command and commandfor would have made the linking of the two much nicer. Apps following the islands pattern will also benefit from this feature. Sidenote: I think the web's biggest problem in the future will be how hard it is to deprecate functionality. Maybe we need Html6 to be about removing/simplifying features from the browsers?