So a user on OCN recently posted that his Das Professional S Silent has nearly completely lost its tactile bump after only a couple of months of use.
As we all know, the only difference between a Cherry MX red and brown switch is the color of the plastic stem, and the presence of a bump on the brown switch's slider, which gives the MX browns their tactility. Plastic is not an indestructible substance, and over time the bump on the MX browns wears down and the switch loses its tactility, becoming nearly linear.
Normally this wear process takes millions of keystrokes over years of use. I had a Compaq MX-11800 that was between five and ten years old and heavily used, and it was perhaps 90% linear.
Now, my Cherry G80-8200 and G80-62410 (MX SPOS) have been used for about eight months and five months, respectably. Both are still very tactile. There was a change in feel during the first month or so, but that was merely the switches breaking in, becoming a little more loosey-goosey.
So knowing the wear process takes year, hearing this OCN newcomer to mechs talk about his MX browns becoming linear in only a month, I laughed him off. But it got me thinking.
I have one other MX brown keyboard; an XArmor U9 prototype that I got last fall. I did product testing for a couple weeks, reported the results, then put it away for several months. Its feel during that time was very similar to that of my Cherry G80 keyboards, just with a harder landing and perhaps a slightly lighter feel.
But I lent the U9 to my step dad to use, after he spilled a Dos Equis on his HP rubber dome. He's been using it for maybe two or three months.
Today I tried using it, and the tactility is almost gone! It isn't quite as smooth as an MX red, but it's much closer to that than to an unworn MX brown.
Has Cherry started using a softer, less wear-resistant plastic in its MX switches? Or are plate mounted switches made less durably than PCB mount switches? Clearly there is a major difference between the switches in my G80s and the switches in that Das and the XArmor.