I know this wasn't directed at me, but I use a Pixel + GOS
Pro: I keep my bootloader locked and just hit a button for updates.
On LOS, you could go through some kind of relocking process each time, but updates are pretty darn frequent. As a result I ran around with an unlocked phone... Which is honestly stupid.
Con: It's really not a cheap route. New features on GOS like android auto require you to have a fairly newer pixel. They do drop out support as time goes along too. If you get a pixel 7 or 8 now you can expect something like 7 years support. What I'm saying is, if you get some Pixel 5 today, you aren't getting all the updates...
Also android auto disconnects somewhat frequently while I drive. I can't blame GOS entirely, android auto is a weird app, and aspects of it are head unit dependent... But my LOS experience was flawless.
The point you raise reminds me of when Signal dropped SMS support, after my efforts to convert all the non techie people in my life over to it. So sad when it happens...