Not about the Mac but I thought interesting about the Rolling Stones. This is something that has worked well for them.
https://theconversation.com/rolling-...r-no-one-92556
Excerpt:
"Returning, or retreating, to the blues that influenced them initially seems both a natural and a strategic move. Strategic in that it taps into a lineage of long-running performers that predates rock. But also natural enough given that the blues has been a musical thread throughout their albums and shows... For an act such as the Stones, harking back to their musical roots may be a way of aligning their musical development with its own antecedents, at the same time as allowing for a mode of performance less reliant on the physicality of their younger days. Paying tribute to the past – both their own, and musical history more broadly – is a means of carrying it forward. Time may be on their side after all."