> imagine you’re an Apple exec who gets to see earning charts, iPhone, iPad and MacOS. One of these things is not like the others in both usage numbers and profit.

You are correct, one of those is not like the others, but it isn’t the Macs. According to their latest earnings report, iPhones made Apple $39.57B, iPads $7.37B, and Macs $8.24B [0]. I wouldn’t be surprised if iPadOS and MacOS merged in the near future, especially since they are running on the same chips, but it won’t be because iPads are the ones making all the money.

[0] https://www.cnbc.com/2021/07/27/apple-aapl-earnings-q3-2021....