???
You can still install alternate OSes (eg. grapheneos) on their latest phones.
>And now, they're making it illegal to install custom apps too: https://keepandroidopen.org/
Besides the questionable use of "illegal" (what are they going to do, send you to jail?), that's not even accurate. You can still install apps after a 24 hour wait, or no wait at all if you use adb.
The article is pretty clear in the opening lines that this is a Google Research grant to the University of California, not even primarily done by Google employees.