Linux isn't even relevant in this context with it's <1% DWM install base. Android, yes you have a point, though a Mac and Android is a strange combination.
Probably so, but there is one demographic well represented here that does this routinely: Developers. Macs are the default and often mandatory computers issued to developers at tech companies (I strongly disagree with this approach and think employees should get the platform they are most comfortable on, but Macs only is the current state of things in most places).
So many use Macs because of work, but have Android phones due to reasons I won't articulate here, mostly due to time but also with the audience on this article I expect it would melt down into an argument about which flavor of ice cream is better (metaphorically, not literally). Suffice it to say, Android users would agree with the reasons, Apple users will say you shouldn't be doing those things anyway, and we'll have to agree to disagree.
Anecdotally, it's also my subtle impression that iPhone users are more inclined to update frequently regardless of how much longevity they could get out of it. I just buy my phone and keep it operational for as long as possible, only buying another if my current one is physically inoperable, and I feel like I'd get to that point more quickly with an iPhone, since parts are more expensive and not as readily available.