i have had severe obstructive sleep apnea for a quarter of a century, but have been using CPAP successfully this whole time ...
Mine was present for at least that long but went unnoticed until an episode of acute respiratory failure. Mine was severe as well, but I went past a CPAP level and live with a ventilator plus supplemental o2. But it’s all good.
The SW algorithm is called AVAP. Means Average Volume Assured Pressure