I think the one point that needs to be considered, is that maybe they aren't selling enough of the lower end product to justify keeping them in production. A good example is, or least last I heard, that Vandersteen would like to discontinue older designs such as the 1,2,3 series, but he continues to get so many orders that he continues to offer them. As with ARC, maybe they don't get enough orders to financially satisfy the "bean counters" at Fine Sounds to either produce or update and therefor must let them go. Which may indicate that McIntosh may be forced to trim their line up as well.
All of course just my point of view not representative of any insider information from ARc or Fine Sounds.
One thing for sure, I will continue to buy when budget permits.