[wallflower]

Flex was ahead of its time with Spark.

It was behind its times with mxmlc. mxmlc made it painfully clear, even with incremental compile, that you were building a client-server application in a web age.

Once you wanted to build custom UIs, you lost the "WYSIWYG" GUI rapid development environment that was the whole selling point that Adobe came in with.

The data synchronization system worked but it was opaque and how (at the time) they made their money.

Flex lost to the open web.