Anything acidic in the pan for a while will start to strip your seasoning.The vast majority will be vegetarian dishes (I'm not searing meat). I've seen some mention of acidity not being great for cast iron, so I guess tomatoes etc. are out? Not sure how big of a concern that is.
It's not too much of an issue if you just keep using it and season it properly.
That being said, why do you want to go cast iron?
