Lou Gehrigs disease?
Seriously, I don't think that "A Love Supreme" is overrated, but, as Jim Sangrey implied, 'tis a pity when its well-deserved status keeps folks from appreciating other valuable works by that quartet. I think that "First Impressions"and "Crescent", for example, rank right up there.
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Are you thinking of First Meditations?
I love all that late period Coltrane. ALS is the gateway drug.