Google has actually taken great strides to make custom ROMs as easy as humanly possible

I guess that is besides:

• slowly, but surely, stopping development of many AOSP core apps in favour of their own proprietary apps.
• ensuring many of their apps are basically unusable with a custom ROM
• making it so easy for app devs to block custom ROMs

Dunno, but that’s all Google stuff.

Iirc the plan was to only allow buses (and maybe black cabs?)