This made Unix so reliable. If you want to write a beautiful terminal as _addon_ I have no problem with that. But I would not accept a _replacement_ of the old fashioned terminals. Because they are so simple, they just work.
Meanwhile, it took Unix forever before the PC's backspace key 'just worked'.
The terminal guts are unbelievably gnarly, and it's kinda surprising it hasn't been replaced with a simpler approach designed for virtual terminals by now.
This made Unix so reliable. If you want to write a beautiful terminal as _addon_ I have no problem with that. But I would not accept a _replacement_ of the old fashioned terminals. Because they are so simple, they just work.