Except its not true. Apple needs a lot of high-end third-party components, and if the third party can't deliver them, there is not much Apple can do. Other companies might ship more computers, but the big portion of those computers are low-end parts. This is what most likely happened with Iris Pro Broadwells/Skylakes. Also, remember how in late 2016/early 2017 it was almost impossible to get a Polaris 11 GPU? The likeliest explanation of that is that Apple has bought essentially the entire supply, leaving only lowest quality chips for the rest of the market.
They moved quite a lot with the 2016 refresh you know. They could have kept the old design, just slapped some faster hardware on it. People would still buy them and the profit margins would likely be higher (and of course massive savings on R&D etc.). Your vision and Apple's vision simply don't align here. Which is cool. There are plenty of people who love the ideas behind the new Mac.
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We can still make fairly accurate guesses based from Apple's release history and current state industry of the art. Right now, Apple shows indications of wanting to revive their old release schedule, which always closely followed the hardware availability. The real problem is Intel, not Apple. Intel's release schedule is totally messed up, which makes the old good "two updates per year" very difficult to pull out. Thats also probably the reason why Apple stopped relying in Intel's integrated graphics in the 15" model and went back to their traditional "dGPU in every 15" design.