A year after the release of version 10.3.3 the distribution of BlackBerry OS versions looks the same as it has since last summer with roughly half of all users running the final version of the OS.
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 October 2016 through the end of October 2017.