Congratulations on doing so well.
I was only recently diagnosed, but have had intermittent symptoms for at least 20 years. This last year I went on a research binge trying to cope and understand.
They have pretty good data from studies about MS over the life span. The percentage of people who don't get disabled eventually is low, but not zero. Also, a larger percentage don't get hit hard until later in life. Also, those studies are of course based on people who were not treated early, because the drugs were not available.
Unlike you, I spent 20 years with benign ms unrecognized by doctors. So I didn't get whatever benefit the drugs bring when used early. In your shoes, I would verify that I actually had ms. (I don't know your facts. This may or may not be relevant). Than, if I had ms, I would look hard at my risks and options. At minimum, I would maximize nutrition, exercise and vitamin D, and stop smoking if I hadn't already. The evidence is clear that smoking is horrible for ms.