ARC is not completely obvious, sure, true, but it's a very very very hard stretch to call it worthy of 20 years of monopoly. It simply seems like a multi-tier

ARC is not completely obvious, sure, true, but it's a very very very hard stretch to call it worthy of 20 years of monopoly. It simply seems like a multi-tier cache (which it is, after all, it's 4 LRU duct taped together in a useful way). And, maybe there's nothing wrong with the 20 years, the problem is how hard much it costs to license it, how much the whole discovery process costs to the whole industry.