After reading the dodekalogue I’m convinced that stallman was absolutely right. Tcl is a nutty language.
If by ‘nutty’ you mean ‘simple, neat & clean,’ then sure. Tcl does have its odd corners, but on the whole it is to strings what Lisp is to lists & Lua is to hash tables (or maps, if you prefer). It’s a very powerful little language, and can be a real joy to program in.
It’s great for config files & scripts which drive bigger programs.