While Apple's recent release has 50% adoption, the *previous* release of Android is still only at 10%
https://www.express.co.uk/life-style/science-technology/1192397/Android-problem-exposed-low-software-adoption-rate-Google
"Six months after release, only one manufacturer managed to get half of its portfolio updated, and only two managed over a quarter. A full year after release, only three managed to break the 50 percent mark! And the two most important and largest manufacturers — Samsung and Huawei — ended up at around 30 and 40 percent, respectively.
The lion's share of phones sold during that period were running the latest version, but very few existing phones were upgraded to 9."
Google can't fix the Android update problem - The Verge
https://www.theverge.com/2019/9/4/20847758/google-android-update-problem-pie-q-treble-mainline