What? By then the most recent intel mac will be what, 6 years old? And will continue to get security updates for the foreseeable future? Do you expect them to still be making new OS versions for PowerPC as well?
More things can be done through the web interface than before, but it's still not web first, and not being able to push a button because your OS is 6 years old is pretty frustrating.
I will not care about a multi trillionaire company's bottom line.
Projects like NetBSD are innovative because they work on all devices.
While Apple hardware is innovative because its cutting edge, MacOS is mid at best.