So... Last night I "upgraded" my phone to Android 12. Big mistake. It claimed to have improved battery saving technology and security features. Oh no. It never drained the battery from 100 to 1 in two hours before. Hundreds of new eye candy "features" everywhere added, each with new innovative ways to send data over the network. Unremovable. No choice. This version appeared to have been designed and managed by marketing engineers. All the quiet non-connected settings I had were altered. Or removed. Animations everywhere. No longer possible to set the lockscreen background. It's gone. Now my phone looks like any other branded phone at the cell phone kiosks. Watching the power consumption, it's at least 3x with the screen turned off and locked. Lots of wakeups and network access. All my defaults, like zero "emergency alerts" were turned on again so I could hear scary Amber Alerts all day and night. I'm thinking of all the security attack vectors they've added from all these useless mandatory networking "features." This is Android 12.
This may force me to go to full Linux by the end of the year. The phone is no longer mine. It's been overtaken by unremovable features that like to chat over the network.