I'll add to the chorus here. Since getting trochoidal/adaptive CAM in Fusion 360 I've all but but given up using slotting in aluminium, even when doing cut out paths.

Although i have yet to run some "tests" to see where the limits of my machine are I'm getting 5mm DoC from a 6mm 3 flute rougher at 2.4mm stepover in 6082 T651 ali and it doesn't seem to be any where near moaning about it. Whereas when slotting I've found that the "window of safety" is small enough that you only need something in the recipe to be inconsistent e.g. a gummy spot in the aluminium or something slightly off with the machine that day and what normally runs well with a good spray of chips the day before, becomes the howling chatter marked cut from hell.

There is of course operator error on my part as well, so a wider margin of error is always welcome :)