I've been using OpenBSD going on 13+ years. I have never upgraded a release on the first day. In fact, I usually wait a few months, and I never install all the file sets.
This is, until yesterday, I installed 6.7 on my new router box and it went without a hitch. And, I installed every file set except games. All patched, all working, and I'm happy. Thank you Devs, thank you from the bottom of my heart, for your hard work!!! Jay