Of course not. Flash is a moving target, and there's better and more cross-platform things to spend effort working on.

It's sorta like all the projects to emulate Microsoft technologies. They're good for bare minimum compatibility, but not serious attempts at compatibility as your target is constantly moving. This leaves you permanently behind (which is where MS/Adobe want you) and you're only reinforcing their platform.

I'm sure Adobe would be unhappy if a free alternative to their plugin came along. All those uppity mobile device users might think they should be able to use Flash without the handset maker paying $BIGNUM in licensing fees.