I think the truth is somewhere between the two hyperboles. Gram Hill's minimalism as an overriding cause is taken to completely silly extremes. However, the principle of getting rid of shit you don't need (and better yet, not buying shit you don't need in the first place) is quite sound.
It's worth noting that he hasn't stopped. http://bikesnobnyc.blogspot.com/2011/12/2011-year-walls-kept... is quite excellent, with such lines as, "So, being the good minimalist that he is, he immediately paid way too much for almost nothing."
I think the truth is somewhere between the two hyperboles. Gram Hill's minimalism as an overriding cause is taken to completely silly extremes. However, the principle of getting rid of shit you don't need (and better yet, not buying shit you don't need in the first place) is quite sound.