It is kind of funny looking back on that thread.
)
Like spamray said, at the time, there was a lot of controversy around "knockoff" Cherry MX switches. The patent had just expired, Cherry switches were hard to come by, and lookalikes were popping up - so it made sense to specify.
Nowadays, the non-Cherry switches have taken on a life, branding, and reputation of their own, so there is little chance of confusion and no need for such a strong stance.