I can only speak for what I have experience with, as one with ALS who has required NIV to live for the past 2 years. I adjust all 3 of the machines I use myself. I can't breathe on my own, but I can still initiate a breath while awake. When sleeping, my ability to trigger a breath (from the bipap or trilogy ) is so weak that I am dependent on the machine to initiate the breath. I have the breaths per minute and time per breath adjusted comfortably for me and sleep well every night. The trilogy and my Respironics system one bipap machine both possess enough pressure for me. They also both have the ability to work automatically based on preset tidal volume settings (called AVAPS). This is supposed to allow them to adjust on the fly to the patient. I have been much more comfortable setting my own pressure and timing. The trilogy has more adjustments available, but in my case does not preform any better than the AVAPS bipap for sleeping. I do feel safer using the trilogy at night because of the built batteries and alarm. In theory the trilogy should be more reliable.
During the day I use a Respironics dreamstation bipap pro. This is just a dumb bipap machine with no backup rate. I prefer this because it has enough pressure for me, it is also very smooth in its air delivery. Most importantly, because while awake I can still trigger the breaths, it makes eating, drinking and talking much easier to coordinate. I have an external battery on the dreamstation that I have tested and it lasted 22.75 hours. (I have 5 batteries just in case). Actually had a power outage that lasted for 13 hours about a month ago. Would have been a real problem for the trilogy and it's 6 hours battery life (could have got another 3 hours from the cough assist battery)
I'm sure I didn't use all the proper terminology or even describe this very well. But my point is that if a machinist with no degree can comfortably survive on adjusting his own bipaps with ALS, than it probably isn't as complicated as the professionals would like you to think. Sorry for the boring rant..... I just always read about all the confusion and then feel like people get so discouraged when they think it is so complicated. I feel that if your life and comfort depends on the equipment, that you should not rely on someone else.
I'm pretty sure that a trilogy (can go up to 40cm h2o !!) could be setup to help Corona virus patients. I wouldn't be surprised if they are hard to come by soon. I'm glad to know that even if my trilogy breaks, that I can still survive on a bipap and sleep comfortably on a bipap with the appropriate backup rate. Hopefully someone will feel the need to correct my rather unprofessional views, but maybe someone will find this useful