pgroll is definitely interesting; it overlaps between both schema management tools and online schema change tools. At scale, I would want to have a better understanding on the performance implications of putting views in front of hot tables. I don't like its use of YAML. iiuc, it is an imperative migration tool, not a declarative tool.

Grate is also imperative, not declarative.

That last link (david.rothlis.net) is about a declarative tool for sqlite, not Postgres.