In my opinion, this is a valid question.
Which has been answered. S4ME is now an anachronism but changing names is not simple.
For those who may not know ME/CFS has multiple meanings.
ME/CFS does not mean ME and CFS. It is clear that it refers to one category. Occasionally people misread it as and if they do not know what it means.
Otherwise it has a single meaning, which, like rheumatoid arthritis or dementia, has various slightly different definitions because there is never a perfect way to define an illness. The research community has no issue over these differences.
ME label refers back to the original outbreaks
But, Colleen, have you not read what has been discussed here at all? The original outbreaks were of acute epidemic viral illnesses that someone thought were due to an atypical enterovirus. There was never any good evidence for that and nobody is interested in it any more i the scientific community. ME/CFS is something quite different, along the lines of Ramsay's 'chronic ME' which turned out to follow lots of different infections.
They clearly stated anyone with the CFS or ME/CFS diagnosis needs to be further screened in order to know if the patient has ME.
And to be frank these 'experts' had no idea what they were talking about. They included a number of people whose research claims have been discredited. The ICC never actually said what this "ME" is supposed to be in pathological terms. The abnormal biology claimed at that time has not replicated.
We now have quite a bit of science showing that these different patient groups need to be stratified so they can get accurate treatments.
We don't. Please give citations if you want to introduce evidence. There are no ''accurate treatments'. Everyone in the research community knows that.
In my personal experience I fulfill the ICC and know people who don't and have an ME/CFS - IOM diagnosis.
Which is entirely circular.
I will have a look at your links but if there is research of this sort of any merit why does nobody know anything about it?
Edit: All I can see so far are the great long lists of unconvincing unreplicated findings that we have been trawling through day by day for ten years now. In science you do not just believe all this stuff is solid fact. You accept that most of it will turn out to be irrelevant or wrong. I don't see anything that shows the need to stratify yet.