>Assuming you have (or can get) one.  Most of them are obsolete.

This may be true.
However, I can choose inferno if I really want to run such a thing
like Plan 9 on a newest hardware I have.   After I got inferno
on our Plan 9 system and on my home Windows/95 machine,
I got this feeling from deep.

Then, the reason why I'm using Plan 9 on our Univ. is very clear:
I love its clearness and simple is best principle, in other words,
I'm one of 9fans.   ^_^

Kenji