Good question! I prototyped some stuff on Dart/Flutter. What I took away from it is that a) I really liked Flutter b) I really do not like Dart. I really tried to like Dart (mainly because I was enthralled by the idea of Flutter) but it just didn't click for me. It seemed like the syntax was trying to be intuitive in some ways, logical in others, and that incongruity really made it hard for me to pick up. I think overall it felt inconsistent in confusing ways. I also was both simulaneously impressed and disgusted by the fact that it render everything in a canvas for desktop...I mean, it totally makes sense, and what a great way to get consistent rendering acros platforms, but I wonder what the tradeoffs are. Accessibility must suffer in some way, but maybe they figured all that out.

I wish Flutter was just a regular GUI library for another language (C maybe, so you can use it from everywhere, that'd be nice). Dart really killed it for me. Also, I know it's beating a dead horse, but Google doesn't have a good track record with long term support of their projects. If it was a grassroots open source project, I'd probably feel a lot more secure putting aside my Dart-inflicted OCD and really picking it up.

Given my current love affair with Rust, my main squeeze right now is Tauri. Once they hit mobile platforms I think it'll be unstoppable, and in the meantime whatever you can do in Tauri you could probably translate to Ionic.