Its user base is small and the sim is boutique and it has a very good physics model for helicopters. Like X Pane 11 it is actually certified to use in commercial sims and it is EASA approved so it can be logged as flight hours ( subject to approved hardware of course).
The current upgrade is probably more of an incremental step but its good they are keeping the development going but its more of a sim as opposed to a game like MSFS, there is a big difference.
I am not too concerned about having the whole world in a sim, I will just make my own local scenery when the sdk is out like I did for Fs2.
I was happy with the few Orbx provided too and I built some around them.
The best part is the frame rate and VR as it simply blows everything else out of the water, its amazing though it will be interesting what X Plane 12 is like .
Don't expect to be a game like MSFS but it has it's niche in the world and the developers have kept it up to date and in that respect its graphics API is still ahead of MSFS.
I might add that I think there will be tears and pain when Asobo push DX 12 through as I think that will break just about every addon to some extent!