Great counter example, thank you. Accompdating people with disabilities is totally worth it though imo, as an example of a very minor cohort that's not all about percentages.
I use Vimium in Chrome to be able to use the keyboard to navigate web pages. Gmail in particular conflicts with this by implementing its own keyboard shortcuts that interfere with my workflow.
Some people may like it, but I'm just saying that it's not a feature that isn't disliked by some people.
From a comment below.