My suspicion is they'll fork the arm architecture at some point (either via a legal agreement with arm or just taking the deploy the lawyers approach and doing

My suspicion is they'll fork the arm architecture at some point (either via a legal agreement with arm or just taking the deploy the lawyers approach and doing it unilaterally). Apple like their walled gardens and closed eco-systems so there's no clear reason for them to switch to RISC-V whilst they're very happy with their arm eco-system.