I was recently on a support call with Microsoft and the engineer told me I should run
psconfig after installing
SharePoint 2013 AND
windows server OS updates.
I questioned him twice on the windows server updates and he said I should. Running
psconfig after OS server patches, especially because of the frequency they come out, significantly raises the bar for us.
This doesn't make sense to me so I wanted to run it past people here who probably have a lot more knowledge of this subject than me.