I reckon jumping ship is all about the economics, as has been mentioned, an act of survival seen as following a trend.

Depends what value you place on the music you love. If it is a business then yes you must make certain adjustments to your approach in order to be on the trend. Thats not necessarily a bad thing to most and it also has arguable consequences for the evolution of the music.

I still stand on the side of 'variety' in a set or production as being the only future we have, coming back to the individual artist to be known for their own origianl work that will stand out most obviously if they are not following a trend just to make a dollar.

Chasing one genre to the next only milks a sound to the point that everyone ends up hating it due to saturation.