Is having your frontend hook directly into to your database without a backend a standard? I almost exclusively saw it in locked in BaaS platforms over the years

Is having your frontend hook directly into to your database without a backend a standard? I almost exclusively saw it in locked in BaaS platforms over the years (like Firebase) I've barely even seen PostgREST offered managed: is even one managed Postgres provider with the right combination of PostgREST and go-true to let you move over today? Edit: I also don't get why this is such a point of contention... Since when is BaaS not just a trade off between initial velocity and later stage lock-in? The former is not worthless, but like most tools you should understand the tradeoffs involved