Would you use postgres to queue a billion messages a day consumed by dozens of applications? Or a message broker like kafka? Would you store dozens of TB of dat

Would you use postgres to queue a billion messages a day consumed by dozens of applications? Or a message broker like kafka? Would you store dozens of TB of data in postgres or in a dedicated data lake? Would you put your business logic in Oracle stored procedures, basically denying the possibility to change DBMS? Would you put your applications log and monitor data in a RDBMS? There's no better tool generally speaking, there's the tool more suited for your use case, RDBMS are now very good, but not for everything.