As far as I understand it, it seems to be a feature only available to Mac apps that use a cocoa text system. Which is probably why you cannot use that feature in Drafts. But seeing as Drafts is so well integrated with the functionalities of Mac OS, would it maybe be possible to somehow enable the word completion Drafts for Mac, too?
That feature works in Drafts. In my experience it’s unpredictable throughout the system…it’s like one of those old NEXT features that everyone at Apple forgot exists.
It does interact with a number of other settings, however (system-wide, not just in Drafts). Make sure you have the newer “Check spelling while typing” setting turned off, and “Correct spelling automatically” turned on in Editor Preferences for the syntax you are using.
Oh I see, I got it, thanks!