Why doesn't everyone use Modules ??

[J. P. <J....@Qu...>]

Hello Modules-Interest List,

I was recently made aware of the Modules package when Cray 
adopted it for use with UNICOS and their mutifarious versions
of compilers etc.

I appears to be an extremely useful tool and one which I'm sure
many people have thought about developing from time to time.
Seeing as it is so good why aren't more people aware of it ?

It doesn't seem to have made an impact in any FAQ (like
comp.unix.shells for example) and indeed it took me a while
to find the Tcl implementation using AltaVista.

So where's the catch ?? 
Why hasn't the Linux community (who are quick to adopt good ideas),
for example, latched onto it ? Is it because of the Tcl ?

John P.