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.
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.