I've no idea really how it was, but insiders preview resolved all my OS bugs, so the recent focus on bugfixes, despite everyone complaining about that, has definitely been beneficial.
The few small feature updates are handy. Share icon, paired with hand off app, is kinda dope.
Apps is a mixed bag. The devs that jumped on with 8.1 and Silverlight, some of them are jumping ship. At the same time, those that are taking up full UWP, are jumping on. So apps are leaving and arriving at the same time. Expect that trend will continue as Silverlight will be phased out, and windows on arm will bring more UWP.
For older users this might be perceived more as "apps leaving". For a newer users like me, I see it more as "apps incoming", because I don't have those old app habits, that the older users do. I hope and look forward to UWP getting more fire in its belly.
What I would love to see, is the serious flush of centennial apps - a few of those start to move to UWP when windows on arm is released. That happens, and an ios port or to, I'll feel pretty confident about the app future. Kinda feel like win10ms future, and UWPs future depends on the dual "herding" strategies of windows s, and windows on arm.
We will however need, at least one small screen device released in the next few years, for devs to bother scaling correctly at the small end, past the size of smaller tablets.
But yeah, that's an aside. As I understand it, win10m has been buggy, and that's only really _just_ being resolved.