Linux/Unix - still using archaic command line (based on early limited ascii)
We've had this thing called X11 (or Quartz Extreme if your Unix comes from that fruit vendor) since ... well.. the 90s or 80s even. And the Command line, at least on all the Unix systems I use, are UTF-8 with support for UTF-16 if I wish. ASCII ? Heck, haven't heard of plain old 7 bit ASCII in almost 25 years, we've had Extended ASCII for quite a while...
What an uninformed post.