Seven years of cutting aluminum and using a cyclone (an Oneida 2hp model) dust collector without any explosions!
Any threat of aluminum being explosive would require it to be ground to the point it can be suspended in air. Try taking some chips from your CNC and drop a handful. How much of it stays suspended in the air and how much drops immediately to the ground? I'd say 100% will drop and none will be fine enough to cause it to be suspended. The chips would have to be the size of talcum powder to float in the air, and if the chips were that fine, the CNC would likely break the end mill from overheating.
The biggest issue that I see from using my dust collector with aluminum and plastics is that I can't dump the dust in the compost heap. Other than that, I see no downside.
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2013 PRS 96x60x12 (Centroid upgrade)
4hp Spindle
12" indexer
Aspire
Rhino
Fusion 360
Ferrari 360
Prusa MK3S+
Prusa XL multi-tool