> how bad the search is for launching apps (I know some people are going to chime in and say search is fine, but if you have a lot of apps installed, it can be laughably bad)
I think the variation in experiences is the variation of people with Cortana on. With Cortana on, I've never had a bad experience with app search in Windows 10. Using machines (such as work laptop) with Cortana off there are some very weird moments where search just stalls out that it shouldn't.
I think there are two trends that should help:
1) In Insider builds for the upcoming 19H1 release (round about March) they split app/local-machine search from Cortana UX again, and it's getting a lot more standalone testing because of that. (Pushing Cortana back more to the core voice search / assistant focus.)
2) Microsoft is in the early stages of the process of a big Bing "Enterprise" / "Cortana for Business" push. That may also help reduce some of the search differences between consumer uses of Windows and enterprise uses of Windows.