They are on the lowest level at the moment. I think they will not

Yes, it is a good website. Also, you can use the man in linux to know more about each command and their parameters

Furthermore, google indexes the websites with non mobile version with very low rating since 20th April

It depends on the website. Some pages can be managed via phone, because of their mobile versions, but page, which does not have a mobile version is a nightmare to be managed.