I agree with your general point, but be a bit careful here.
> Wiring devices and breakers have accepted both Cu/Al wire for the last 50 years.
It’s true that, for a little over 50 years, the UL has regulated what devices may “accept” Al wire. But devices have had markings suggesting use of Al wire for longer than that, and it was quite unwise:
https://inspectapedia.com/aluminum/Aluminum_Wiring_Repair_CO...
Don’t get caught up in all the discussion of repair devices — AIUI this article is mostly about “repair” of old pre-8000-series Al wire. You can’t buy that stuff any more. As far as I know, modern Al listed building wire is only sold in 8 AWG and up, and this stuff doesn’t need “repair”: it’s perfectly fine in any appropriately listed connector.