Yes. They're "the norm" in some countries and business niches ( e.g. banking, but not Germany, there it'd be SUSE), software only comes packaged and tested for

Yes. They're "the norm" in some countries and business niches ( e.g. banking, but not Germany, there it'd be SUSE), software only comes packaged and tested for their OSes, etc. For everyone else, there's Debian/Ubuntu/whatever.