Phabricator is used by a few big names like FB and Uber, and at startups that splintered off from those places, so a good number of teams but nowhere in the Git

Phabricator is used by a few big names like FB and Uber, and at startups that splintered off from those places, so a good number of teams but nowhere in the GitHub PR range. It’s pretty opinionated around things like fewer bigger repos, rebase-by-default, trunk-only: basically the stuff that big shops use (because anything else is an NP-hard pain in the ass, literally, once you’re dealing with feature flags or A/B testing or bandits or any of the stuff that you need if you’ve got a consumer-facing product with a lot of users).