In general complete devotion to the craft by constantly practicing like it is a habit and not just when inspiration strikes is essential.
One could argue this lack of devotion predates even the smartphone. Heck, I remember getting a Nintendo Entertainment System in the late '80s and then not going out biking or playing basketball as a result.
Hendrix was a working musician who paid his dues on the chitlin' circuit with artists like The Isley Brothers, Little Richard, Ike & Tina Turner, and Sam Cooke before making it on his own. AFAIK those are pretty high-pressure assignments, and count as real work...
