Whether the computer in your basement had a hard drive or not has no bearing on whether or not SelTrac was cutting edge at the time (it was). That there were even computers with microprocessors put SelTrac decades ahead of what was in use elsewhere at the time.

> glaring factual errors

You keep parroting this maxim without showing any convincing evidence of an error... what's the point of that? You obviously have some affinity for factual correctness, yet your style of argument and evidentiary rigor appears to boil down to "repeating the maxim many times in many different places makes it more factually true" which is obviously nonsense. Maybe some food for thought?