James Hersey performs at BottleRock Napa Valley in Napa on May 28, 2017. Alessio Neri/STAFF. James Hersey has a strong opinion on artists who give up their dreams for financial success; those who collaborate with so many songwriters that they lose their voice along the way. “It becomes diluted,…

Jai Wolf performs during Mad Decent Block Party at Greek Theater in Berkeley on Sept. 10, 2016. BERKELEY — Tiësto and Dillon Francis were the biggest names at Mad Decent Block Party Saturday evening at the Greek Theatre in Berkeley, but it was Slushii, the last of eight DJs to…