There's a lot to admire in OpenBSD but sometimes the peripheral tools they deliver don't work well. The example I know best is OpenNTPD (last link in your comment). It has a bunch of problems, including relatively poor clock discipline compared to other NTP implementations. And it doesn't even try to handle leap seconds. That causes problems on the machine itself which may or may not matter to you, but it's catastrophic if that OpenNTPD serves time to other servers. Unfortunately there's a bunch of OpenNTPD servers in the NTP Pool actively providing bad time. Some details from the 2016 leap second: https://community.ntppool.org/t/leap-second-2017-status/59/1...
Again I mostly admire OpenBSD. But OpenNTPD is not the best example of their work.