Full review of feature flags

[wra-sol]

Let's determine where we want/need feature flags, as well as best implementation.

Ngl, mine is pretty haphazard.

[sai-sy]

Feature flags should pretty much be nowhere. I think feature flags are helpful on prod but unhelpful on hearty. It clogs the testing environment. Feature flags for private features for prod is probably way more helpful. Like when billing goes into effect.