build-system design document: how relevant is it now?

I'm trawling the GHC wiki looking for things that will help me understand how the build system works and what might need to change for cross-compilation. I stumbled across https://gitlab.haskell.org/ghc/ghc/-/wikis/design/build-system which git helpfully tells me dates from 2008. I assume that none of it is relevant any longer. In its current form, the page seems only likely to confuse future contributors. I'd rather not leave things that way. Does the page have archival value? Is there a directory of legacy pages to which I should move it? Or shall I just delete the current text and replace it with a short note? Or what? Norman