I agree the thread is getting unwieldy; is the idea to set up a half dozen or so replacement threads? (There was a suggestion on this a couple of weeks ago.)
Also, what are the examples of the kinds of posts that are off topic? Just about all of the posts have seemed very relevant to me; I have no interest in modifying my machine but would a thread on COVID early last year not have allowed someone to post about how to get alternative hand sanitizers? In this case, it is the recall that has driven people to take drastic actions because there are limited options for people to stay with their therapy: they must use an old machine, find a used machine, fiddle with their machine, pay $1000 for a new machine, deal with unresponsive insurance, doctors and suppliers, all while waiting for a "fix" that is not available to solve a problem that has not even been fully described.
This is all because the manufacturer recall for the US says only one thing very clearly -- if the condition is not life threatening, discontinue use. Only if it IS a serious condition, do you and your doctor speak of the possibility of continuing its use. That is a terrible set of dilemmas -- people with less serious apnea have no guidance on what to do and people with serious conditions will be told by their doctors to "consider" using the machine anyway. Those are terrible choices and result is the chaos we now have. The thread is just a reasonably calm reflection of the chaos.