@antony - thanks for the input! Would it be acceptable to still delete the content but add a note like this on the main hosting page?
Looking for 3.x Hosting information?
See the old docs site which has a complete copy of hosting 3.x information. Otherwise, the hosting section here includes information for CHT 4.x and later.
That way we can delete it, but folks who still want to read 3.x info can easily find it. At an even later date, we can decide to remove the note and the archive.