Why Did Adobe Buy Macromedia?

Six years on and this is as good as the speculating got:

http://www.richardlord.net/blog/so-what-are-adobe-up-to-with-flash

http://it.slashdot.org/story/05/04/20/2246214/why-did-adobe-buy-macromedia

The fact that Slashdot never got beyond the superficial (and very unsatisfactory in my opinion) explanations might be an indication of Slashdot's non-designer fanbase.