I remember ages ago (a decade? or so?) I started working at a company using Postgres for a project, and one of the things my boss asked me to do was to set up replication for the database. We had it on all of our MySQL databases, and everyone knew (myself included) that Postgres was a more serious, enterprise-y, "real" database.
Well, I googled around and couldn't find anything conclusive, so I hopped into the / channel for postgres and asked about it. "Is there any straightforward replication solutions for Postgres?"
It was like the early days of open source all over again. The first thing they did was challenge my needs. "Why do you need replication in the first place?" "Replication isn't a panacea you know." "Postgres doesn't have the issues that MySQL does that makes replication necessary." "Replication doesn't work well in the first place."
A ton of people jumped into what had been a quiet channel to make sure I knew that replication, which postgres didn't have, was something I didn't need in the first place, most of which happened before they even knew why I was asking.
After sorting through all that, a few people suggested "solutions". "Just have a cronjob rsync your data directory over to another machine every minute, and if your first server dies then you can just start postgres on the second one." Other solutions were much more convoluted. Patch postgres, add this software, manage it all yourself. And through it all, they kept telling me that I didn't need replication anyway, "but if you INSIST…".
In comparison, the MySQL channel on freenode was staffed with MySQL employees and volunteers who were always happy to help you solve your problem while teaching you what you were missing and giving you resources you needed. They'd answer questions, help your configuration, and even fix your SQL queries for you, all without being condescending about it or making you feel like an idiot.
And that's why I gave up on Postgres: the community. Postgres's was ridiculously hostile and self-important, verging on insecure and defensive. MySQL's was helpful, friendly, and full of resources. To this day I still hear great things about postgres, and I know it does a lot of things better than MySQL, but whenever someone writes a self-superior blog post about it I always think back to how much easier my life was by using a database where I could ask questions of the community and get useful answers.