Allaboutjazz.com has published my comprehensive look back at 2015's goings on in the jazz world. In short, it was a curious blend of ups and downs, with glimmers of optimism offset by its losses.
Venues opened to great fanfare, but others closed for a variety of reasons. UNESCO’s International Jazz Day became firmly entrenched as the exclamation point on Jazz Appreciation Month activities in April. Daily arts journalism took a hit with music writers leaving significant newspapers. A prominent trumpeter found himself under FBI investigation for program funding in New Orleans. The jazz world said goodbye to lot of players and industry figures throughout the year, including five of its NEA Jazz Masters.
You can dig a bit deeper into this compilation from the link above.