This sucks. I use adb to uninstall all of the system apps like facebook, youtube, web browser, etc. to give myself a minimalist, distraction-free phone that still has niche apps, maps, and communication apps. Might have to look into the expensive light phones as an alternative now if this update hits my phone.
I had the exact same problem because I had a strong addiction to smartphone apps.
I looked into the Light Phone and The Mudita Kompakt, but I ended up buying a refurbished Pixel 8 and putting Graphene OS on it, then I installed only essential apps I need. I keep my old iPhone 12 in a drawer at home and use it for anytime I Need any apps that don't work on a custom ROM, which includes my bank app (plus, imo, it's safer not carry around a phone that has my baking data on it in case it gets lost or stolen).
The light phones are a really cool concept but the Light Phone 3 is quite expensive (more expensive than a new Pixel 10) and the Mudita Kompakt seems to have a huge amount of grievances from users on their forum, so that put me off.
They can still be disabled.
You have never been able to uninstall apps from the /system partition with adb (without root). You have only been able to disable them to stop them from showing up.
> I use adb to uninstall all of the system apps like facebook
I've only ever used Cyanogen/Lineage or Graphene, so I had no idea this was a thing. I'm not surprised but ... WOOF.