Yes, they seem a bit big for the task. The install document in slashcode.com's FAQ also has the information (probably from 2006) that slash only works on Apache 1.x and they don't plan to support 2.x. Either the website is not up to date or the slashcode ;-)
Many of the biggest sites on the net run on Apache 1.x. There's really nothing wrong with it, although for a new project I'd probably start with Apache 2.