Still a great and useful tool (tho over the years it became slower and slower with each release, just like any adobe product) but the export to html / air / openfl etc. are nowhere as good as the OG flash runtime of yore.

Useful for exporting movie and packaging assets / animations to then be consumed by a custom engine but not worth the effort that much when you have spine, etc. which are better supported and used in the industry.

Scaleform still seems to be used by some AAA studio (I'm always surprised to see it) but I can't imagine it they will continue to use it for long.