[racket] Aging code

On 2013-07-10 18:03:07 -0400, Sean McBeth wrote:
>  -- Embrace more of the Unix philosophy of small programs doing one thing
>  well.  You cannot deny that programs like ls, cd, mkdir, grep, etc. have
>  lasted a very, very long time and have no need for being changed (beyond
>  the occasional discovery of defects).

It's interesting that you mention these examples. While `ls` and `cd`
are less likely to be superceded, a lot of other unix utilities are
improved or replaced by competitors.

For `grep` there is `ack` for example. There are many versions of the
`locate` utility, many competing ntpds, fetchmails, many pagers, and so
on. It seems like in these cases what's more important is the "service"
(or perhaps "interface") that is provided.

Cheers,
Asumu