This is good advice, unless it doesn't fit your use case. As an example, using pg instead of redis is great until you need to handle hundreds or more requests p

This is good advice, unless it doesn't fit your use case. As an example, using pg instead of redis is great until you need to handle hundreds or more requests per second. Using pg instead of kafka works great until you have to ingest a few gigs of data a second. Using pg instead of mq works until you have a few thousand messages a second. Etc etc.