Because it is expensive and contains quite a lot of moving parts, requiring precision engineering and possibly manual assembly. I doubt these were scalable to m

Because it is expensive and contains quite a lot of moving parts, requiring precision engineering and possibly manual assembly. I doubt these were scalable to mass production. (Additionally, it contributed to the thickness of assembly — tho those who don't remember, Thinkpad 701 was _incredibly_ thick). I owned a 701c, the keyboard was clearly better than anything available today.