https://en.wikipedia.org/wiki/APL_%28programming_language%29...
https://en.wikipedia.org/wiki/APL_syntax_and_symbols
https://en.wikipedia.org/wiki/APL_%28programming_language%29...
One of the examples there uses the ⍨ character!
I posted an example of hyper operators a little while back, and used the Texas variants because I thought it might be intimidating to show them with Unicode...and, they were just so darned clunky looking, I had to change them back, and included a little note that there was a non-Unicode way to use the feature, as well
Still, I can't imagine having to type those regularly. I don't count keystrokes or anything, but that just seems harsh.
Anyway, I think I'm sympathetic to where you're coming from; Perl 6 is challenging looking. We may disagree about why. But, I think I like the Unicode enough to consider it a net positive for readability, even though I also think it makes for a very broad and deep language that will need ages to properly wrap ones head around. But, then again, if a language isn't big and broad, a big and broad ecosystem develops anyway (see JavaScript and so-called "JavaScript fatigue" for a prime example of that), so there's still a tremendous amount to grok before being really productive and literate in the language.
[1] Not all are the common LaTeX macros. See http://docs.julialang.org/en/latest/manual/unicode-input/