[gattacamovie]

using zalando's patroni operator in k8s at scale for years (mainly OCP but pure k8s as well). Features like in place major version upgrade are no match for any of the alternatives checked. Close to it is CNPG (cloudnative-pg) which is 2nd best and in 1yr might take the crown. (for companies, best part is that cnpg has enterprise support for it (named pg4k, a fork of cnpg).

But, above all, I would warmly recommed anyone to first do their best to use cockroachDB (or yugadb if you like more) instead. The benefits of distributed/horiz scaled DB usually overcome the effort of moving to it (which should not be big as it's using same pg client/protocol). And it's free if you don't need enterprise features like partitions, etc.