Those friends of mine are PgSQL noobs (hence the choice to use docker), and have no plans AFAIK to deploy kubernetes in the near (or distant) future. So to say my opinion on the advantages one by one :
- they dont create and drop DBs regularly, e..g I upgrade from 14.* -> 17 yesterday so this DB was live for some years now.
- they have a few small DBs for the moment, with one being the main, so no need for squishing either
Sounds like SQLite might be what they're looking for.