Dogfooding was a virtuous cycle for user and service provider alike, because incentives were aligned.

Then growth - excuse me, metastasis - came along.

Thanks to metastasis - excuse me, enshittification - we've outgrown dogfooding. We'd used it as a kind of UX gyroscope, something that works to keep us balanced without too much institutional thought or effort. It made us more efficient at competing. Now that the biggest firms are the least threatened by competition, why would they subject themselves to the indignities of the User?