>Maybe there's no technical reason, but I can think of some legal reasons why
>they might have done this (related to how KBs are "support", and if we're
>axing support on a product...). But technically, yes, server space is cheap.

Yes, but reviewing articles for relevancy is expensive -- I think that's another reason why articles for obsoleted products are dropped. I'm not inclined to chase this down any further, but would be willing to help out if you could get the ok yourself...