codepages, cyrillic alphabet, pearls in the mouth of the corpse, unicode, ligatures, emojis, history of all that stuff and funny real-life stories along the line in one video by Dylan Beattie:
My opinionated TLDR: Plain text is a simple format is a huge (gigantic) oversimplification :)
@abcdw
'John, you're an idiot.'
Agree.