Our team is using IntelliJ for AIR/Flex development since 4 years now and we
are really happy with it. Its fast, reliable and offers a bunch of useful
features. Haven't worked with Moonshine or VSCode yet but heard they are
also quite good.
I would think the bigger and more complex your project is,
One thing no other IDE has developed, which is why we still use Flashbuilder
4.6, is a GUI development environment similar to design mode of
Flash/Flexbuilder.
Yes FlashBuilder has lots of bugs that drive us crazy, but the ability to
design screens with more or less pixel perfection is very use
