AA is the last United States based airline to even have one. This move is an industry-wide trend now that lie-flat business class seats are standard. Business class has gotten much nicer in the past 10 years and taken away the customers that previously would have flown in first.
I'd rather fly Qatar qsuites or many other si-enclosed business class seats than the first class ones remaining on European airlines like British Airways, Lufthansa, of air France. And doing so is a fraction of the price.