I don't want to be any deeper into Apple's ecosystem than I already am. I do use a five-year-old Macbook Air for work and for home recording and editing videos up to 25 minutes long, and it's great for that. I also have an iPad mini, I love for the form factor -- I use it mostly for writing on trips with a detachable Brydge keyboard that turns it into a laptop. But they do not talk to each other or synch to anything, and certainly never to IKloud. I use a USB drive to move files around.
I work in a confidential occupation. I need all my devices siloed, with no devices talking to any others automatically. I also need to take photos on a device that is never online (at least if I keep the WiFi off!)
iPhones also lack physical headphone jacks and removable SD cards, which are essential for my creative applications. The UI for iOS is also excruciating, with icons moving around at random, etc. In many or most situations, I find the R100 to be more consistent and reliable than a mobile phone, but that's partly because I often need to capture stereo audio with a corded stereo microphone.
As for the wisdom of using mirrorless cameras on eBikes generally, one of the only ways I can get to places I want to take the pictures I want is on an eBike. And I need practice using my camera! I will not learn anything shooting just in my backyard.
Another advantage to using a mirrorless camera while eBiking in an urban area is that the camera is less likely to be stolen than if you were on foot. If I am approached by dodgy-looking folks, they are usually on foot, so the camera goes right into the belt holster, and I can leave the area quickly.
I do agree that I wouldn't bring a camera worth much more than about $700 with lens for eBiking. And I do have a different set of priorities than most folks.