to be honest W3Schools captures a certain segment of the market.. ie the coders.. this does not mean that those dynamics match your players. whatever historical issues IE has had, they are gone. I prefer IE11 because of do-not-track and for privacy reasons. that's my call.
However whatever you believe, I still do not see why if you are going for a desktop application that you should deliberately ignore IE11 users.
now I have seen this before on Scirra.. it's very much a google-orientation here and understandably so, but I'm not sure it's good for all cases.
PS: in my local university all the browsers are modern IE's.. mostly for the business and arts students