Not sure whether this changes anything about your critique, but note that the IBM 2741 terminal embedded a Selectric typewriter:

> Selectric-based mechanisms were also widely used as terminals for computers, replacing both Teletypes and older typebar-based output devices. One popular example was the IBM 2741 terminal

https://en.wikipedia.org/wiki/IBM_Selectric

Well, it says right there, the 2741 replaced Teletypes. It wasn't a Teletype. (Not sure I'd call this a "major gaffe", though!)

Not a capital-T Teletype but it seems like it was widely used as a teleprinter and had similar mechanical constraints/requirements. The post does touch on this language ambiguity:

> Teletypes (technically "teleprinters" - "teletype" was just the most popular brand name)