[yas_hmaheshwari]

There was an article from Uber on why they shifted from Postgres to Mysql: https://www.uber.com/en-IN/blog/postgres-to-mysql-migration/

I don't know how much of that article points are still valid.

The other part in favor of mysql (in my opinion) are that there are lots of companies that use mysql in production - so the access patterns, and its quirks are very well defined Companies like Square, YouTube, Meta, Pinterest, now Uber all use mysql. From blind, Stripe was also thinking of moving all its fleet from Mongo to mysql

Perception wise, it looks like companies needing internet scale data are using mysql