I should get some cast iron sometime when SWMBO is out of town and do that seasoning. She'd never let me cook on it if she knew ahead of time that it was cast iron. Don't know why.
Fairly recent "old wives tale" that cast iron leaches into food, causing all sorts of horrible diseases? Aluminium has been linked to Alzhimers, plus you can literally destroy it with acids.
("Sure, vaskidmark, simmer that tomato sauce all day in the pretty aluminum pot." Somewhere around the 3:30 mark a leak developed, but there was nobody home to notice it. Almost as much fun as when the future ex left a pot of eggs simmering (deviled eggs were planned) while she went out "to get a few groceries we needed." Do not EVAR boil a pot of eggs dry in a cheap aluminium pot and then think only one can of Lysol spray will fix that odor.)
stay safe.