Words have meaning.
Also my usage very much matches early "computer hackers" in a cultural sense. If I was just going off of the word origin itself we'd be talking about horse and carriage drivers...
If I said "prototypical automobile", I can only really be talking about a Ford Model T. I couldn't be talking about a 60s Mustang, no matter their popularity/familiarity.
"denoting the first, original, or typical form of something".
An example: "the phone emerged as the prototypical example of point-to-point communication".
The usage of "prototypical hacker" by tastyface above fits neatly in the "typical form", while you're using the "original form".