alt Hacker NewsTcl is still entirely stringly typed. That's never changed.
There are under-the-hood optimisations to make it less insanely slow but that only affects performance.
Tcl is a cool hack (the interpret is simple to write) but it's insane to actually use it. I wish the EDA industry would realise that.
Tcl 8 introduced dual-ported objects. Everything can exist as a typed object that is convertible back to a string in certain cases (some form of string operation typically). That plus the bytecode engine makes it work completely different than prior releases.