Then I started noticing my wife's Google Photos storage use growing again. Somehow her phone had been switched to backing up on Google again. I turned it off. Then it happened again. And again. She couldn't explain how it happened, but I suspected she was the victim of a scary prompt warning that her photos weren't getting backed up.
This wasn't happening to me because I had switched my phone to LineageOS, but hers was still a stock Pixel with Android.
Lately, I have run across a different example of Google locking in its services. As part of our process of leaving Google, we moved our email, contacts and calendars to mailbox.org. I set up her phone's calendar app to use the new server but to my dismay every new appointment was defaulting to use the Google calendar service! I switched her to the Etar calendar app (which is the default app on LineageOS), disabled the default calendar, and asked her to use Etar instead. Everything was great until I began to notice that her new appointments were showing up on Google again! I look at her phone and see that Etar is completely gone and the only calendar app available is the default Android one.
This calendar fiasco only just revealed itself the other day, so I haven't had enough time to figure out how or when it happened but it feels like it might be the same Google Photos tactic of sucking people back into Google.