Google laptops and workstations (anything that can actually access srcfs to get this data) are extremely monitored and controlled.

Very critical stuff (ranking, spam/abuse, etc) can be further protected via silos which lock down sections of the code base (but still allow limited interactions with the build).

Google spent significant engineering $$$ into its development tools and policies (generally building custom with no intent to ever monetize vs buying). I don't see a company today, in this climate, that would emulate that decision.