User blog comment:Rappy 4187/Technical Update: May 20, 2015/@comment-3416247-20150523185432/@comment-4129195-20150523213400

They are on a break at weekends.

Besides, it is a complex, gigantic database they got. My belief is when they try to improve a feature or make a new one, it, for some reason, affects others. Could be just bad compatibility, which they compensate by making changes every week.

Though they should also prioritize, if they haven't, the list of changes. I still remember months when uploading an new image over an old one (with the same name) took weeks to be changed. Glad that's gone.