How prevalent is Tcl usage in the real world? You don't hear much about it, are there any new startups adopting it? Or is it only used in legacy projects at large companies?
The funny thing is, that the use of Tcl is explicitly advertised as security through obscurity:
"The combination of AOLserver and the TCL programming language is not commonly found in the Internet, so a potential hacker will need to expend a considerable amount of criminal energy in order to reverse-engineer the application stack." [2].
[1] http://www.project-open.com [2] http://www.project-open.org/en/project_open_architecture