as a former employee who has worked both in many other companies over a decade + starting a few startups, Meta tooling is one of the best if not the best, it's

as a former employee who has worked both in many other companies over a decade + starting a few startups, Meta tooling is one of the best if not the best, it's so good to a point where Saas companies came out of facebook simply by replicating their internal tooling, like Asana, Scuba, etc