Today I use Flash Player 11 since it's the last one released by Adobe, for linux-based OSs. The same applies to Flex/AIR platforms: I use Flex 4.1.4 and AIR 2.6, while Windows and Mac systems have newer versions (at least 4.6 and 3.1 respectively).
Is there a (trusted 3rd party) community making a good port (good stands for compatibility) of those newer versions to Linux-based OSs? Or is Flash/Flex/AS3 actually dying*?
(* my concern with this point is that I would not like to stick to an unmaintained technology in a mid-term future. Currently I'm learning Citrus Engine + Starling and I'd like to know if it is a bad).