Familiarity comes to mind. Dart has developed into a nice direction with sound null-safety, extension functions, sealed classes and compilation to native&wasm.

Familiarity comes to mind. Dart has developed into a nice direction with sound null-safety, extension functions, sealed classes and compilation to native&wasm. (The libaries weren't very mature when I used Dart, not sure if that changed.) I'd pick Kotlin because I'm familiar with it, but if mdhb is familar with Dart, maybe from his work with flutter, maybe from a time where you'd mostly use Dart to compile it to js, then go for it. Dart is a nice enough language to earn my thumbs up. (not that that would be important to anyone.)