Significant? Very. Has the significance made any difference? No.
LC research has pretty much validated decades of research on ME/CFS. This is highly significant. Looking back at everything we knew before, there was a very blurry picture and LC has made it in full focus, clear and crisp. The research so far hasn't added anything new, but what was known before was dismissed so validating and patching up the holes, especially the mild infections being the most common risk factor given their higher prevalence, is highly significant.
But it hasn't made a dent in the traditional myths and practices. Psychosomatic ideology continues unabated, doing the same old crap it always did, leading nowhere, producing nothing of value, but holding up all the space.
It hasn't lead to any predictive knowledge, which is really what we need. Knowledge in itself is unfortunately pretty much irrelevant. The process of science looks mostly one of ignoring all the clues until someone puts them up together in a way that allows to make predictions and can be used as technology, then all that past knowledge becomes accepted because anyone can simply use it to produce better outcomes.
The problem isn't inherently with the research itself, it's the old giant blocker on the way that is holding everything up: ye olde psychosomatic beliefs. Nothing at all has changed for the patients. A tiny few have the benefit of clinicians who know a bit better, but the only real difference is that a bit fewer of them are getting the wrong advice that will make them worse, but in absolute numbers it's probably far more because of the size increase and absurd intransigence of the medical profession.
The problem is the same as always: medical culture and its myths & traditions. Those have not changed, are still the reason why everything is blocked everywhere. For sure it can be said that without LC, we never had any chance. Now we have some chance, it's probably a question of time, but seeing how things are unfolding, I have no hope that it will make a difference for me. Maybe those under 30 will have some chance at life. It depends how technological process continues. It's the only thing that really matters in the end, the only thing that makes cultural blockages irrelevant. Without technology, we are stuck with human judgment. And human judgment sucks absolute donkey balls.