Is Windows Terminal not fast for the features that they have? I didn't hear anything about PHDs but I am curious about your mention of being proven completely false, PHDs and the story behind that.
They're referring to a situation described here[1] (HN discussion [2]).
Whilst I know this was the M$ PM being deliberately obtuse here, in some cases modern SaaS marketing has elevated previously routine CS topics to "PhD material" to the layperson for a sale - and it's quite a shame when the propaganda drips through to tech-adjacent people.