The distribution of BlackBerry 10 OS versions is just as boring as you would expect it to be for an abandoned operating system. Almost all users are on some variant of OS 10.3.X with roughly half running the newest point release.
This data was collected by BlackBerry World for downloads of the free strategy game Pixelated and the free checklist app Stuff I Need. Data shown on the chart is from the beginning of May 2016 through the end of May 2017.