In reply to Miroslav Glavić.

If you are doing a single site, great. If you are doing dozens or (in my case) hundreds, it's a total pain in the rear - especially if the "fix" isn't relevant for your installations. So, let's say 200 sites, 10 minutes each, that's 2000 minutes... or about a full week's work. at 20 minutes, it's a couple of weeks, and at the speed of Wordpress updates, it's almost turned into a fulltime job - and generally one that doesn't pay the bills, because it's maintenance work that generates little real new income.