Netscape 4 is newer than Internet Explorer 6

Browsing W3Schools, I've found something interesting – IE6 is older than Netscape 4.

Sort of. From their incomplete and somewhat dogmatastic overview of web browsers: Netscape Communicator 4.8 was released from Netscape in August 2002. whereas [Internet Explorer 6.0] was released in August 2001.

I know this has nothing to do with the age of the rendering engine, but dumb users know and care nothing about the rendering engine; in their eyes Netscape 4.8 is newer than IE6.

So if you're gonna stop supporting one of them next time you design a website, shouldn't it be the oldest? (Ideally, screw both of them.)