I don't think that's a rule, I think Twitter's length restriction has lead to quite a few good things too. Restrictions in general are a great way to motivate c

I don't think that's a rule, I think Twitter's length restriction has lead to quite a few good things too. Restrictions in general are a great way to motivate creativity. Of course there are limits to this. There are times where a 40m video or a proper 10 page blog post are more appropriate.