Update : this is good too :
Thinking about this, I’m predicting my own behaviour with the Mac App Store. I’ll probably start trying out all sorts of free and low-cost “apps” if they look like they can provide me with instant gratification. (Especially if I can use an external hard drive to store them.) And I’ll probably buy a few “apps” that I can justify, in terms of effort and cost. But I might give up quickly on these if my initial experience isn’t optimal (if the apps in question aren’t worth the cost or effort). And I’ll try different things associated with these apps I do enjoy.