[1] https://github.com/withoutboats/notty
To help offset the irony and celebrate Turing completeness, here is a PostScript interpreter implemented in PostScript, and an explanation of why.
http://www.donhopkins.com/home/archive/cyber/litecyber/ps.ps...
http://www.donhopkins.com/drupal/node/97
Even when C like performance is required, C++ is actually used instead.
The three major C compilers (gcc, clang and VC) are all written in C++ nowadays.
In the enterprise world Java did that - even high frequency trading applications have been Java based for quite some time. Compared to 20years ago, there is significantly less C code nowadays.
[1] https://github.com/withoutboats/notty