> Having the islands of actual react stuff is incredibly useful as well.

I've tried multiple times to come up with usecases where they are worth it, but still haven't found any. The only theoretical examples are things where you wouldn't be using Astro in thr first place, like real-time document collaboration or something.

Curious what you've found them so useful for. Besides just preferring React syntax to HTML+TS I guess? But again that seems to go against the point of using Astro.