Because MySQL looks easier for people who have never done SQL, which allowed to be the M in the LAMP stack and the only suported db for Wordpress. I had little

Because MySQL looks easier for people who have never done SQL, which allowed to be the M in the LAMP stack and the only suported db for Wordpress. I had little experience with Oracle SQL at school, and MySQL's bad design became very apparent to me, even when I was a junior dev. I'm afraid devs are repelled from SQL because all they've seen is MySQL. Postgres has everything Oracle has, with an even better design, and minus the price.