Just finished and packaged for ibooks author a Children's book. Half way through a second one with Edge.
Would it wise or safe to continue with Edge or look for an alternative. They are simple animated cartoon style books.
Edge was fine for my needs. Will these files be any use with other programs (the New Flash "Animate") or any one that takes OAM?
You're fine to continue using Edge Animate. Development has ceased but the app will still be available and loyal users have pledged their continued support in these forums. For your needs it will be worthwhile taking a look into the new "Flash" Animate as it will possibly be better suited for you and they have listed OAM support as an output capability. But there is absolutely no rush, you have plenty of time to adapt your workflow.