This is funny because the first keyboard I had, back in the 386 days (1992 I think), didn't had this problem. I remember playing two player games on it without any "ghosting". The keyboard was very solid - hard plastic keys and metal backplate. It was nearly indestructible. Even though new keyboards appeared over time, we still used this one for about 12 years, particularly because that all new keyboards had this ghosting issue. I never understood why. After the 12 years space key began to malfunction a bit and we had to throw it out. It was a sad day for us :(.
Which is funny to me because I remember playing Asterax on my Quadra running system 7.1 or something, and my friend Reid and I yelling at each other "stop turning! I need to go forward!" or vice versa.
Nowadays I can't imagine buying a keyboard that shares the same technical limitations. I would consider it ... I don't know, disrespectful to my 12-year-old self, that 20 years later I'd still be dealing with the same dumb problem.
The main issue is cost, as always; the keyboards from that era (IBM Model M and such) cost $100-$150 at the time, which would be even more nowadays. The hardware in those was much more as you'd expect it to be. The technique described in this article is much simpler to make, requires no soldering, etc.
You can splurge on a more expensive keyboard (I have a Filco Majestouch at home) that don't use this cheap techinque and have a much better feel.
I've been looking for the Majestouch NINJA [BrownSwitch/Fullsize/US ASCII] (1). If I find one, I hope I can get the proposal past my minister of finance.
