not my experience - I switched a year ago and have yet to notice anything not working. X backers rant about things all the time but realistically for most wayland just works. the example - xkill - is something that should be killed on X since it is a big security issue. there are also a number of cases where X does not work and cannot because of design issuses, but I have never encountered them either.

which is to say try it for yourself - odds it works and you won't have to worry.