Hey Talker,
I like epoxy for my hidden pin scales and hidden tang knives. Like bowdoc, I've tried super glue on bone inlay and haven't had any failures. But then I haven't with epoxy either. But I take great pains to make sure I don't.
The thing I like about epoxy is you can color it to match the color of the insert or wood so any slight imperfections don't show. And It actually makes the epoxy stronger, depending on what you use.
That said, epoxy does not bond well in really thin layers. So if you use it and clamp it tight, be sure to relieve the mounting surface of the scale or nut wood to give it thickness. And be sure to really texture both, at least in the middle, to give it something to grip no matter what glue you use.
Heck there are guys using Gorilla glue now for knives. They swear by it. I've actually got one I'm carrying around as a test piece before I sell any. But it has it's issues for use too.
Looking forward to seeing what you do with it!