Pity no one has time to expand the w3fools site - it is such a small sampling of the many antiquated things on w3schools that the two guys that own w3schools just haven't kept up to date. Given the number of topics they cover and how long it would take to keep each up to date they really need to employ a staff of a half dozen or more full timeers if they really want to keep their site up to date - rather than just treating it as a hobby.
If they hadn't got such a misleading domain name then their site would be long gone by now - some sections of it are so out of date.
Both sites suffer from not having enough people to properly maintain them.
Helping others to solve their computer problem at http://www.felgall.com/