Titmouse Inc.’s Mike Roush puts the redesigned Adobe Flash Professional – with new tools and even better functionality – through its paces in a real-world production environment.
Adobe Animate CC from a Flash Veteran’s Point of View
I still use Adobe Animate. I find it useful for rapid prototyping with designers. WAY quicker than doing pure AS3! You can also go back and harden the source code into more AS3, allowing for a smooth transition into a live environment release.
I’ve seen devs take .fla’s and cut them up into an Apache Flex project.