For example, a startup not testing small changes right? Well unfortunately, an entire landing page makeover, while not overly difficult can windup taking a great deal of time. The redesign alone is just such an "opinionated" process (even by people who know nothing about design...) that throwing that much investment just to test is hard to justify. So even though most startups shouldn't waste time on stuff like button colors...that's often the only thing they'd have time for.
Of course I'm talking about the smaller scrappy startups. Not the ones backed by prolific amounts of capital.
Don't get me wrong. This is a GREAT article, I just would like to know the best level of effort for ab testing for the smaller guys.