Of course it was worth it. Today the porting cost are so ridicously small, even smaller games are released on PS4/X1/PC combo and propably Switch will take some love ( Tegra chip ).
Good example is Gears of War 4 X1/PC - they have make a test in December with cross-play and the results are clear - 91% of participants were X1 owners, rest 9% were PC owners.
10 to 1 and MS still want to release their games on PC.
http://www.eurogamer.pl/articles/2017-01-29-gears-of-war-4-z-opcja-wspolnej-rozgrywki-na-pc-i-xbox-one