There is/was a discussion on the development list today regarding a problem when
running dnf upgrade from a terminal window under a DE, e.g. GNOME or KDE.  What kind
of surprised me was that apparently the "official" Fedora stance is use the GNOME GUI updater
which updates via reboot and that it is unsafe to do it from a terminal within GNOME or KDE.

I have never encountered any issue so was trying to obtain some stats about exactly what the risk/benefit is... the only thing I could find was within the following thread:

https://lists.fedoraproject.org/pipermail/users/2015-March/459603.html

"... Updating online works 99.8% of the time. The 0.1%
time it will corrupt random bits of your file-system, and 0.1% of the
time it will leave you vulnerable to the security issue you thought
you just "fixed". The only way to fix this so that online updates are
safe is to redesign the centralised shared package model we use for
distributing applications. The workaround is to use offline updates..."
Also, as I understand it (and this may have changed) is that within KDE there is no "offline" update solution.  Apper basically does it the same as issuing the command from a terminal.  
So, what is the recommended KDE solution for this?  I stated on the development list I thought rebooting for every update was basically sacrificing system availability for what appears to be a very minor risk.  Perhaps I'm missing another point or am completely off base here.  That is why I'm wanting to know what other KDE users think of this. I've been entering DNF/YUM UPGRADE from within konsole for many years and have never encountered any corruption issues.
I try to keep up-to-date with things, but I completely missed this, and apparently it was introduced in F18.