The "What every IT person needs to know about OpenBSD" article series
If you've read to the end of comments, you might be interested enough in the subject that you could be enticed to read a reference-rich 3-piece article series over at apnic.net, starting with https://blog.apnic.net/2021/10/28/openbsd-part-1-how-it-all-started/, also available as one piece minus APNIC's edits as https://bsdly.blogspot.com/2021/09/what-every-it-person-needs-to-know.htm, by yours truly about the time OpenBSD 7.0 was finalized.