on there keyboards
What do you mean by "there keyboards"
As far as I know all the latest arrangers (SX series) USING Audio Styles! Can you name "there keyboards" which "Yamaha no longer use audio styles "
We now have revo drums which are much better.
This drum set maybe is "much better" according your opinion and maybe this drum set fit "much better" your music performance needs.
But not all Yamaha arranger users have the same opinion like you and not all Yamaha arranger users have the same needs like yours.
Audio drum tracks are always far - far better than any midi track.
Audio drum tracks can catch the groove of a real musician something almost impossible with midi tracks.
Furthermore the specific drum sound for many music styles (Soul, Funk, HipHop) are far better with audio drum tracks than the "much better revo set"
Also not all users want top play "Strangers in the Night" like you...
Many users want EDM styles or more modern music styles. In this case audio drum tracks works far better since they can have the specific sound of a drum machine or groove box. This sound is impossible to recreate using the "much better revo drum kit"