As it turns out, people who write databases have a really vested interest in making the database really fast 😄
I was a MySQL enthusiast prior to its open source licensing days, using it for personal, education projects and hoping for that day. Fast forward a few decades and imho Monty and Crew lost their way. I had always been interested in PostgreSQL but mostly using it in lab settings. MySQL selling to Sun Microsystems tripped some yellow flags. Oracle bailing out Sun Microsystems tripped three red flags so I have been favoring my old friend PostgreSQL ever since.
Take a gander at the 'who' for each respective project. Behavioral Biologists and Cultural Anthropologist enthusiasts may observe that the 'Developer Culture' is very niche specific.