Most people have high power goals in mind. They just don't know it until they've spent the money, realize they want more, and have to do it again. HOWEVER, there are outliers. Yes, I believe that the guys who can actually stop are the outliers. I have more to say on that subject, but it's not the point.
I made tons of changes until DHM landed on the scene. I saw the capabilities and ability to grow.
You know what else I see? Nearly everyone upgrading their hybrids over and over. Jumping between tuners, settling on not so great intercoolers... Save your money, save yourself the trouble, and do it once.
Some Guy On The Internet