CRNG wrote:

The problem is that many users, particularly businesses, have found
that they can't afford the upgrade process as described above, and
that their current "outdated" systems work perfectly fine and do all
that they want from them. The very smart owners of current systems
have started to stock spare parts from "outdated" systems to extend
the life of their current systems.


Not practical and with diminishing return.
The 'smart owners' aren't as insightful as you portray or perceive.

--
....winston
msft mvp consumer apps