Other World Computing publishes a fantastic blog for customers called Rocket Yard. Here’s a link to one from December by Tom Nelson that covers what works in macOS Mojave and what still does not. It’s full of technical insights and screenshots. It is current as of version 10.14.2.
Check It Out: What Works in macOS Mojave. What Doesn’t
And most importantly, lack of full APFS documentation, which prevents DiskWarrior 6 release to rebuild APFS disks. That is a deal breaker to upgrade from macOS 10.12 Sierra.