Another feature that World be a tremendous timesaver is direct acces to IR start (stop is the same as normal render). I'm using IR almost always, but there are so many situations where Max is freezing or getting redicously slow with IR activated + plus all those situations where you need to "restart" calculation, or where IR restarts by every tiny parameter change. Therefore I'm constantly turning IR on and off, and finding the roll down button very slow and irritating.
For every 1 time I use the normal Render button, I easily use the "start IR" 50 times. So why shall the most used button be the hardest one to reach?