Comment by immibis

RDBMS (you spelled it wrong) are good for many things. Postgres is a veritable swiss army knife - have a look through the manual, scroll through all the features you don't care about, be amazed it has so many.

RDBMS are an old fogey tool. It takes a really old fogey to suggest storing records at fixed byte intervals directly on the disk - is that your proposed alternative? Or perhaps you grew up in the microservices era and that's already become old fogey.