> You misunderstand the concept here. Operating systems move on and become
> more sophisticated. Most good ones move the software writers along with
> them. The users buy new versions which take advantage of the new
> facilities and the whole system moves forward.
>
> If you continually make the whole thing backwardly compatible people
> carry on using the old versions and nothing advances. This is the state
> we have arrived at. Some new features never get used which is both a
> shame and a rebuff for those who worked on the newer ideas. We need to
> move forwards.
>
Indeed, at some point an Operating System - like any other application
or process - will lose some elements of its compatibility with earlier
version/environments. It is simply the nature of how progress is made.
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