Time wasting (side effect)

Overthinking has multiple side effect, one includes time wasting, either you never act or you act to late. In the end it all falls under productivity, but in general if you think to much you expand your time. Once you expand your time you do little to nothing and end up frustrated, yes Rome wasn't built in a day , but productivity sucks if your plan is a discombobulated mess(like the art of overthinking). So think of it this way, excessive thinking is a lengthy activity that threatens your productivity and is a unwanted side effect.