Exactly, so at some point providers stop supporting the old product that sucks in favor of the newer one which is better (or perhaps just sucks less, in the case of IE7) and those few who cling to the old product either make the switch or accept the narrowing applicability of that product.
So really, to address The Dude's dissatisfaction with technological progress:
Upgrade or quit whining and deal with the fact that you can't access some new stuff with the old piece of crap you insist on keeping.
IE5 and 6 will be supported by microsoft for years though.
IE5 and IE6 stop getting support in june of 2010.
Ie7 support ends just before in april which is odd.
At that point IE8 and Firefox should have the majority of the market (with IE8 shipping on the new Windows 7 and Windows Server 2008 R2, as well as being a critical update for all supported OSes at that time (xp pro, windows server 2003, 2008, and vista)