I still use Android, because... pretty much the only viable options for smartphone OSes are Android and iOS. There are plenty dozens of phones running Android:

I still use Android, because... pretty much the only viable options for smartphone OSes are Android and iOS. There are plenty dozens of phones running Android: Samsung, LG, Xiaomi, Huawei, etc. And for iOS, well you only have iPhone. I'd like to see more competitors in the game though: Firefox OS, Tizen, Sailfish OS, etc etc. So far, only Librem 5 looks promising. Hopefully it can gain much commercial and dev support.