I used to work for a company which heavily used TCL[0].
When I started working there, I really questioned his decisions about the stack and the language in general ( everything is a string )
After a few weeks I realized that, this stack was blazing fast in combination with the NAVI[1] server which is written for high performance web sites.
This guy wrote everything you could possibly think of in TCL.
That company is powering a ton of enterprise grade e-commerce web sites.
I still see it as a secret weapon and I'd probably use it as well if there wasn't my fetish for statically typed languages.
edit:
As a side note, I'd like to mention that this guy taught me that I shouldn't go with the hype but just choose a language/framework that helps me finishing my projects.
When I started working there, I really questioned his decisions about the stack and the language in general ( everything is a string )
After a few weeks I realized that, this stack was blazing fast in combination with the NAVI[1] server which is written for high performance web sites.
This guy wrote everything you could possibly think of in TCL.
That company is powering a ton of enterprise grade e-commerce web sites.
I still see it as a secret weapon and I'd probably use it as well if there wasn't my fetish for statically typed languages.
edit:
As a side note, I'd like to mention that this guy taught me that I shouldn't go with the hype but just choose a language/framework that helps me finishing my projects.
[0] https://en.wikipedia.org/wiki/Tcl [1] https://en.wikipedia.org/wiki/NaviServer