> I switched from MySQL to Postgres. Specifically, we are using CitusDB. The performance we are getting is nothing but staggering, due to MPP. You are talking

> I switched from MySQL to Postgres. Specifically, we are using CitusDB. The performance we are getting is nothing but staggering, due to MPP. You are talking about switching between them and even concluded, "I don't know of any valid reasons why anyone would switch back." It might not be what you meant, but to me, it also reads as if you're comparing MySQL to CitusDB.