Stopping DMT

Has anyone either stopped or considered stopping taking their DMT. Growing research indicates that once a person reaches 55,60,65,70 ( I'm stating different ages as I get different expert views) that MS gives up the battle as our immune system changes where the benefits of the drug weakens. There are various studies: DISCOMS DOTMS plus one I've partially been consulted on as a lay peer the REFINE Ms trial in the UK. Today the neuro who put the idea in my head a year ago is now back peddling a bit. I'm 63. Any thoughts on risks or experiences appreciated.