I do use the app on my phone and iPad. It seems strange to me that a device inside my networks should need something outside my network to function in the most direct method (browser straight to device). I was considering starting my wife on the web interface, but it sounds like the app might be a better approach at this point.
I agree that giving users the option to not upgrade would be more complicated, especially when files are accessed outside the OS. If they were kept local, it would be simpler to offer the choice.
The idea that accessing the internal web server of the OS is like accessing an outside website controlled by another entity that changes without your knowledge doesn’t seem like the right comparison. Like I said, I may be unique in my attitude that my internal network tools/toys shouldn’t need assistance from the outside.
Thanks again for the open dialog.