Jason Snell over at sixcolors.com describes a few grievances with a new feature in macOS Sierra that syncs the contents of your Mac's Desktop and Documents folder across all of your devices and optimizes storage on the device by moving files that have not been opened recently to the cloud. In particular, there are problems with syncing package files associated with professional software, even including Apple's own Logic and Final Cut Pro!
Syncing feeling: iCloud Drive in macOS Sierra:
With any luck, Apple’s hot on the case of fixing the bugs. Perhaps the teams in charge of Apple’s pro apps are working on coordinating project files a bit more aggressively. And I suspect that I might be a little responsible for this new Apple tech note, which suggests that if you’re using a pro app, you should move your projects out of synced folders or turn off Optimize Mac Storage.
Yep, that’s Apple saying that people who use pro apps should just turn off or avoid using a major new feature of macOS Sierra.
Unfortuantely, all to many signs today point to the fact that Apple is
a. not thinking about the pro user.
and
b. releasing buggy updates to their cloud services that create caution amongst users as to whether or not they should trust iCloud with their data.