[Swordmaker]

Does this mean they’ll crack 25% of the market in three or four more decades?

This is sales. . . not installed base. In many parts of the USA, Apple Macs already has. . . even in sales.

[conservatism_IS_compassion]

Does this mean they’ll crack 25% of the market in three or four more decades?

This is sales. . . not installed base. In many parts of the USA, Apple Macs already has. . . even in sales.

The larger point has to be that the market for computers which are called computers, and have a keyboard, has peaked. Most computers sold today are called “smart phones,” and some are called “tablets” - even tho they have number crunch capabilities (in GPUs) that would have made us drool twenty years ago.

Your point about installed base relates to the higher average price (read, quality) of Apple computers. If the Macs are worth more money they will tend to last longer in service.