I have to say that in this case you're wrong. The Apple Mac Plus in my parents' closet, which I still fire up from time to time to play Dark Castle (https://www.youtube.com/watch?v=KCkbp4wurW0), had a zero latency mouse (or at least imperceptible) with zero flicker. Took Microsoft at least 20 years to get something comparable. This is not a nostalgic mis-memory, or an exaggeration. Please find an old Mac from the 80's and simply move the mouse around.

> they are recalling computers which had no networking

The very first network games I ever played were over AppleTalk on a Mac, like NetTrek (https://www.youtube.com/watch?v=Z40VMsXtl0Y ... yes, that is digitized sound out of a 1984 machine), Maze Wars (https://www.youtube.com/watch?v=PoEpgfTtUYg) and the venerable Bolo! (https://www.youtube.com/watch?v=Bz_gYZ5kMvc), the latter still one of the best multiplayer gaming experiences I've ever had