I think it's crazy that we limit programming languages to using ASCII in 2022. Yes, I understand the chicken-and-egg issues of input, but it still seems like we're limiting ourselves as developers if we don't make use of a richer symbology. I know Raku supports some Unicode operators and Guy Steele's Fortress language also supported non-ASCII symbols so it is possible. But I'm not holding my breath. This is just one old man's crazy opinion.
AFAIK Fortress did not actually support non-ASCII symbols in the code. What the Fortress team did is have a display layer that was fed a list of symbols using ‘\BigSum’ style ASCII and then merely displayed a selected Unicode symbol in the editor.