We all use text-based fields at one time or another, and being limited to ASCII only can end up ... niche is pasting into HDL (e.g. Verilog) source code comments, where it has a special kind ...

Produce simulated waveforms using ASCII text. The process uses some custom tools written in OCaml, but the code is available ... You could do the same thing with a Verilog VCD file, of course ...