So much has to be inferred from the way things used to be, makes it harder to argue that it's the "simpler" operating system designed for Humans with a keen eye on UX design..
FWIW I also think the flat UI on iPhone (which has been prevelant for >6y now) is a horror show.
Steve Jobs famously once said (while working at NeXt): "There are two kinds of people at Apple: Those that want to push computing forward, and those that want to be the Sony of computers.. and the Sony guys are winning"
macOS moving to ARM is the biggest leap for developers in recent years - Amazon are also developing their own ARM chips and cloud services running linux ARM is the future.
Having a mac with a unix-like terminal environment & support to run linux arm natively when devloping for those services is a huge deal.
on the same note; the"decreasing information density" I don't think would be a problem if you're switching between the "terminal/IDE/browser/excel". the "table views" still seem fairly "compact" so..? /shrug