It is really shocking that we have lost two classical singers very recently. Rashid khan died too young though prabhaji bade us adieu at a ripe old age. However , passing away of both the singers is painful and their demise has certainly created a void. As regards their association with the Bollywood or the silver screen i don't think they did music for films for earning money. Some of them created history while doing work for movies. For example pt. Ravi Shankar, Ustad Ali Akbar khan worked for Satyajit Ray, Tapan Sinha, Tarun Majumder. Just remember the music of Ray's Pather panchali or Sinha's khudhito pashan. Without their music both the films might have lost their flavour. However ustad Bade Ghulam Ali khan was an exception as he wanted to stay away from film music though he sang for one or two movies on request. In 50's,60's ,70's and even 80's films used to have classical songs but after that the taste of people underwent a change hence we find less use of classical music in commercial movies though there may be some exceptions. However, glad to know that new generation singers are singing indian classical.