Why did Miles leave?

I'm curious to know, can you elaborate on the reasons behind Miles' departure? Was it a personal decision, or were there any professional factors that contributed to his leaving? Were there any conflicts or unresolved issues that might have played a role in his choice? Additionally, did Miles provide any insight or explanation for his decision to leave, and if so, what were his main motivations or considerations? It would be great to have a clearer understanding of the situation.