Corey McKrill presented a case study at WordCamp Portland about the process we went through to build Gutenberg blocks for WordCamp.org.
Rani Molla recently published a great article on how misusing Slack makes it harder to get work done, not easier.
Setting up a Multisite instance on DreamHost isn't as easy as it should be if you want to also have SSL certificates, but it's possible with the right settings.
Tara Claeys and Liam Dempsey have a really interesting podcast where they talk to people in the WordPress community about what it means to be successful.
I upgraded from MySQL 5.7 to 8.0, but found that the service wouldn't start. I was able to fix it by manually re-running the upgrade process.
I've been learning Ruby during my sabbatical, and found the exercises from Exercism.io a great way to do that. Manually running the unit tests was tedious, though, so I setup Guard to do it automatically whenever I save a file.