Firstly, it doesn't make all that much difference since there are copies
elsewhere on the web:

http://www.stylusstudio.com/xsllist/

But keep it. History is good.

My first post is pretty embarrassing with hindsight, but it was early days:

http://www.stylusstudio.com/xsllist/199802/post60020.html

After all, Paul Grosso was telling us that they didn't want to have to make
XSL namespace-aware:

http://www.stylusstudio.com/xsllist/199802/post10020.html

The fact that you point to one of the unofficial archives really says
it all; I COULDN'T edit the record if I wanted to. Since the question
is moot, and since everyone who has responded agrees that we should
keep the whole archive, that's what we'll do.