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Tcl offers metaprogramming capability that rivals Lisp's, but they way it goes about doing it is... kinda nuts. I don't particularly care to stare into that yawning abyss for too long, so it sits well behind Scheme in terms of languages I'd reach for.

Tcl/Tk is still an unrivalled way to prototype a GUI -- and with Snit megawidgets, it's almost like programming a modern JavaScript component framework like React.

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Yes, you're right, Tcl suffers from lack of Scheme-like macros. While a lot can be done using procedures, methods and introspection "tricks", often enough it's far from elegant. However I haven't been stymied all that often. Missing functionality can sometimes be provided by C-API extensions which I've gotten pretty good at writing.

Completely agree about the utility of Tk. I remember reading somewhere that HTML/CSS widgets were influenced by Tk. Don't know how true that is but I can see how it could be.

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