Alternatively, maybe Macs would increase from 10% to 15% if the product wasn't broken and over-priced. Maybe it would be 20% or 25% if Apple could cross-sell/convert those iPhone sales to Mac sales.
https://sixcolors.com/post/2019/07/apple-third-quarter-2019-...
There is no world where any computer manufacturing is seeing a large growth in PCs in the last 5 years.
iOS can't replace Mac OS (yet) for serious work. So instead of letting Macs atrophy, they should invest in making Macs the best possible desktop and laptop computers for serious work. Own whatever amount of that market they can. Keep those users in the Apple ecosystem.
https://sixcolors.com/post/2019/07/apple-third-quarter-2019-...