[Two9A]

Sounds somewhat familiar. I worked at a place that replaced a basic LAMP stack with microservices written in Perl and MongoDB as a backing store, for the sole purpose of raising complexity.

And left Mongo on the default settings for the time (speed of return over reliability of saving data), so they ended up with a reporting replica which was MySQL.

Don't think I've seen anything before or since which was architected so exactly backwards.