While it may not be realistic to assume that the 'big thing' is around the corner, I myself have always been telling me that I would feel really stupid if I died half a year before we unexpectedly 'solved' ME to a reasonable degree
I have had this exact thought. I've considered ending my life many times and perhaps the only reason i have not done so is the hope that someday there is a treatment, we can't live if we are six feet under. As for an afterlife we have no evidence, only faith and hope.
As the Bard said The miserable have no other medicine but only hope.
My best guess is
if its easily solvable once a disease mechanism is determined then it could be a couple years. This is predicated on current or near term funding leading to a mechanism, and this leading to good drug candidates that are already approved and can be repurposed. I do suspect Dr Davis' nanoneedle if proven would lead to a symptom control treatment if every drug is tested on it, but what molecule(s) are causing the block?
We can't take lessons from Parkinsons, Alzheimers, HIV and so forth because no disease follows a pattern, mechanism, cause, damage, research and
luck all play parts in how treatable a disease is and how rapid progress is.
If ME/CFS is insanely hard to track down a mechanism for (or theories are untestable) it could take decades and even decades more for drugs to be developed. Personally i doubt it, if something is suppressing pyruvate dehydrogenase as Fluge/Mella have surmised then we need to know what that something is (nanoneedle can help not by drug screening but by species testing/elimination) and where it comes form. Then we can attack it. If its autoimmune for example we have drugs and can proceed to more research, it may even explain how Rituximab works (and doesn't). If its microbiome caused, then that can be attacked, transplants, a drug already available or tailor made to kill the offending bacteria/virus/fungus are possibilities. If its caused by something else such as the liver, cell danger or whatever then we can work on those, and depending on what it is may have several directions to go with or can suggest possible treatments that can be tested.
At this point all we have is questions, we have very limited data work with. The disease mechanism is extremely important unless we get lucky again and come across something better then Rituximab by chance. Perhaps the best we can currently do is to try and have physical and emotional support