I'm not disputing the technical details of anything you're saying. I don't think the author of TFA is, either.

So when you say "this is incorrect", and also:

> Software renderers can do bilinear filtering.

What do you mean? Nobody is disputing they can. The author is talking, in my opinion, about how software and hardware renderers of that time behaved in practice in games you could buy at the time. It's just that peppering the text with "at the time", "typical" and "in practice" makes for very cumbersome reading.

I'm also an old fart, by the way :) I don't remember Flipcode, but I wrote software renderers for fun and also for my CS coursework. I read my Abrash and my Foley & van Dam, etc. I then lost track of that, time was finite and I had to choose my hobbies more carefully!