I find it very hard to understand why anyone would want to add one!
I find it very hard to understand why anyone would want to add one!
I would guess that you are in a small minority here on HN, with most people selecting based on price, feature-set, and possibly brand loyalty/aversion (i.e. "Never buying an Acer again!"). Even if they don't use the nib personally, it's quick to disable and then it's just a visual feature on the keyboard.
I had one and broke the hinges just past my warranty period...
I'm also confused as to why anyone would find it functionally better than a trackpad.
I can definitely understand the appeal - having a mouse on the home row is pretty damn cool - but damn didn't I have a good experience. Using it for a couple days doesn't mean you'll like it.
Even though a Mac track pad might be the best trackpad out there, a trackpad has always been less than optimal substitute for a separate mouse, but being build in the device and always available made up for that gap in convenience.
For laptops, if the principle agrees with you, a trackpoint is a far superior device to even a separate mouse for almost all uses.