I have been pushing a pet idea that we should leverage our RDBMSes as platforms more than we do. Pretty frequently the model layer in MVCs end up with some functionality that would be much more robust inside the database. Validation ends up being done (at least) twice, query results end up being quite distant from objects, transactions which should be one are split, etc. Problems that could be mitigated with user defined procedures in the database.

I think it might be the current state of version control tooling that's in the way here. It can be a tricky and often fairly manual process to sync database changes (even just running the migrate command) when releases are tied to git repos.

That's not to say git repos aren't wonderful, but I see underutilization of database functionality as a subtle downside.