While I don't think the IGH bikes are prime time ready (at least not enviolo based ones), it will still depend on use. I have since identified a few simple potential reasons the drive train may have behaved the way it did. And I am now fairly convinced that the primary issues is actually lack of maintenance experience of these models by the LBS. The problem is
specialized response isn't to diagnose and train the LBS, it is throw parts at it. That's ok to a point, but it meant having my bike in the shop for weeks. And my good weather riding season is pretty short.
I do appreciate how flexible specialized was in supporting the bike and ultimately the return. I enjoyed it so much when it was working that I am *still* tempted to buy the thing again and just let specialized throw parts at it as necessary (thankfully, no stock or it would be a serious risk).
That said, today I learned I like chains more than a less refined rohloff IGH experience. So Automatic IGH > Manual CVT IGH > chain > my bafang/rohloff is the ranked order of riding experience.
I have also seen *zero* of these complaints around the 3.0/4.0/manual IGH models. I want to look into that, because if the automatic is the source of issues, that's a whole different can of worms (and probably an entirely different set of preventative maintenance measures).
Anywho, I have now tried a bunch of similar bikes, and specialized *IS* a very good experience outside of the IGH issues. I am close to buying a chain como 5.0 for my wife and a tero X 6.0 for me.