Dangerous game you play when potential runnout is more than desired chipload…take that how you will.
In my experience, hundreds and hundreds of hours cutting aluminum…0.001 maximal chip thickness has never ever ever ever lead me wrong with any tool I’ve used.
The only cutters ive used that were meant for 30,000 rpm were Datron endmills. 0.005max, I was averaging 0.0035 actual.