But you're correct - they don't mess with it, they slightly and mostly invisibly improve it, and someone who learned it in 80s could use it without problems today.
https://www.youtube.com/watch?v=uqehwCWKVVw
https://www.bloomberg.com/ux/2017/11/10/relaunching-launchpa...
https://www.bloomberg.com/company/stories/how-bloomberg-term...
https://www.bloomberg.com/company/stories/designing-the-term...