NILToday OpenBSD 6.1 has been released, I won't copy & paste the change
list but, in a few words, it gets better.
[Link to the official announce](https://www.openbsd.org/61.html)
I already upgraded a few servers, with both methods. One with bsd.rd
upgrade but that requires physical access to the server and the other
method well explained in the upgrade guide which requires to untar the
files and do move some files. **I recommend using bsd.rd if
possible**.