Where have I been wrong again? You said you destroyed my argument, with absolutely nothing to show for it.
I actually used to do something similar. I would record myself humming a tune on my phone, and then come home and layer the instruments, etc. But at no point would I connect 3 devices to my phone and try to layer a song together, on my mobile device. There are probably only a handful of people who do more than that on a mobile device.
Also, guess what? Music apps =/= mobile music production apps. That 3% of all downloads in the appstore are probably apps like spotify and other music players. And if its not, its still only a mere 3%.
I'm definitely far from a gear snob. Although I do believe in getting the best bang for your buck, hence why I use a Pixel XL. It can connect to and do way more in my home or vehicle, than any apple device/ecosystem could ever do. I value musicians, of all walks of life. From street performers to underground artists, and I actually hate the majority of mainstream music. I don't have the best equipment, but I definitely wouldn't recommend someone spending a good bit for a ipad, and then spend more money on an app, to try and do what could be done in a much simpler, better method.
You keep trying to push this concept that everyone around you is a musician, they all use apple devices, and wont touch an android because they are useless...yet none of them are recording albums or anything they would release to the public on said devices. You even go as far to make examples of making recordings on a walkman and using the idea you had to re-record in a studio. Yet, still no mention of the extravagant layout/example from your original post about having x,y,z device hooked up to your mobile. Please share with us about how you could only do that on an iphone/ipad.