Unity for non-gaming purposes

Since I’m making a game, my first plugin for this game is a non-gaming purpose app.
[WIP] DAD
I was able to make this app because it was much easier to make it in Unity. Using the new Unity UI as a software editor and component from the asset store, for a novice in software development like me, is simple and I like the idea that I can ship multiplatform. Also, using __V__R there is much more room for visual interface than a 4 or 8K monitor! Futuristic App

I ask FontLab developers why they do not use Unity for the new non-gaming purpose app IV and here is the answer:
Forum.fontlab.com flexible platform engine
Looks like they use prefer Qt