I'd include 'completely leaving behind historic music and choosing the radio and the dancehall' as part of the process of adoption. Boy hears Rolling Stones, seeks out John Lee Hooker, plays domestically intoned white blues, forms progressive blues rock band, music ignored for 30 years before being adopted by revivalists with new spin. Process in action.

Never bought into *the* process, only a process. Processes evolve like music, it's perverse to imagine otherwise.