"Wouldn't it be nice if modern programmers had some more symbols at their disposal?" Emacs lets you display arbitrary text as any symbol you want, and you can

"Wouldn't it be nice if modern programmers had some more symbols at their disposal?" Emacs lets you display arbitrary text as any symbol you want, and you can also map your keyboard to generate that text with any keystroke of your choice. So the result is the same, without needing language support for the symbols you want to use. I've done this with the lamba symbol and symbolic logic symbols when editing LaTeX files in emacs. It works great.