The site provides a nice TL,DR:

• Efforts like Graphene OS face increasing pressure from apps that refuse to run on non-standard Android.
• The custom ROM project characterizes Google’s approach to device attestation as incomplete and flawed.
• Graphene OS is prepared to take legal action if Google won’t let it pass Play Integrity checks.

On a personal note, I’m annoyed that our national ID app doesn’t work with graphene OS.

There are workarounds by patching out the security check from the app and sideloading the newly created app, but that is just annoying and has to be repeated for every update.

I just don’t see how rigorose device checks that lock out graphene users, but allow any Android 8.0+ device (where security support ended more than 3 years ago) make ANY sense.

Edit: I tried it again today, it now lets me skip with a warning about the bootloader.

It’s high time Custom ROMs and users alike did this. I cannot run a custom ROM on my primary device due to play integrity shenanigans some apps may have.

Looking forward to this. I don’t run a custom ROM myself but I am rooted, primarily to revoke permissions from Google apps and to back up my OS and app data as I desire.

However I’d much prefer to be able to run something like GrapheneOS on a Pixel if it meant I could run apps that are picky about Safetynet/Play Integrity, such as banking apps and the like

It would be interesting to see if Graphene OS actually takes legal action. I hope if they do they get other projects involved including Lineage OS and maybe F-droid.

I rooted my phone years ago and it was a chore. Once it finally worked, hardly any of my apps would run and nothing important worked because suddenly a rooted phone isn’t “safe”. It was such a pain in the ass to do updates and fight programs to run that I stopped. I didn’t want to spend hours fixing a device that I really didn’t want to think about.

I would love to install GrapheneOS and have it mostly just work. I hate having my phone locked down like it’s not mine, and it’s one of the reasons I won’t use it for anything important over my desktop.