I still couldn't imagine going back to Photoshop, and I found XD unimpressive. As you say, about a year or so will tell.
I know Sketch has frustrating bugs, but I honestly don't think they are any worse or more common than bugs in the Adobe products I use. And Adobe has had much more time and resources to fix these issues.
Maybe people are less forgiving of Sketch because it feels like a more lightweight, less complicated product, so you expect it to be bug free?
Will there also be a Windows version?
Don't think they have any chance against Sketch on OSX, maybe on Windows.
Definitely give XD a whirl in the upcoming months, though, and please please do log what you need in adobexd.uservoice.com. We can't read minds, and we really do want to listen to what the you all need and provide an app that will meet them.
In the last release, I was plagued by one where undo didn't work. Not only did it not work, it randomly shifted layers around the artboard or introduced other glitches into my work. I can't think of many actions that are more automatic than hitting undo — when that essential safety net becomes destructive, it's devastating.
Hopefully 3.7 introduces much-needed stability. At the moment, Adobe XD is still new enough that it won't cause a mass exodus. No layers, for example. But a year from now, either Sketch will have worked incredibly hard to retain the users who stayed because there was no alternative, or XD will have matured and eaten their lunch.