I have intentionally kept my very specific use case mobile app very very simple and not gone deep on the magic edge cases. It is a private app and will never be on the store. It is basically used as a QR code scanner to track equipment.

I'm sure that if you have a lot deeper/larger apps you'd find more to complain about, but so far I'm happy enough with going from zero to full fledged app in about a month of work.

IMHO, the boilerplate argument with Java is kind of outdated (Project Lombok and modern java solve a lot of that).