@dsfgs It's funny you say this because I'm working on a slideshow for a talk atm, and the way it's programmed is a bit like how flash worked too.
I only have good memories of pre-adobe flash, spent countless hours making little animated pictures in it. I still have some of the drawing I made with it.
@neauoire
F5: New Blank Keyframe
Shift+F5: Remove keyframe.
Yes, we have good memories of Flash also but do any FOSS software load the FLA files? We doubt it.