im using the previous version of ios 10 (one before current) and it has some weird battery draining bug and will shut off my iphone 6 plus at 30% and it's very hard to repower on without a charge source (e.g. ext charging battery). it also drains my battery heavily.
the current version supposedly fixes the battery drain (not sure about the shutdown bug) but introduced a bug into another app that i use and don't want to risk upgrading for either.
and this is the problem. apple charges premium prices but their software has gotten sloppy. macos and ios10 included. i upgraded to the latest macos version, sierra, and my escape key would not work for some reason (i was using vim and ended up doing ctrl-c? to activate) then i find out that killing siri on mac would fix the problem. then i found out a couple days later that their new macbook pro would not have an escape key. gee i wonder why they never caught this bug in testing?