It's more than a little ironic to complain about built-in obsolence when your website looks like it was designed in the first year of the web's existence.
Forth has been pretty stable for the last - oh, 3 decades or so. Colorforth is a reasonably minor, but clever variation on the theme by the same guy that wrote the original.
By comparison 'ruby' is a spring chicken. Forth is being used to control just about everything you can think of on this planet, from cell phones to space shuttles.