I have both, and I use 5-ply fully clad more than I use cast iron. My 9 qt is bottom clad only, but the lack of clad up the sides hasnt been an issue. The bottom surface is hot which is what needs to be hot on the stove. The sides arent getting hot spots in the oven, during brazing and stews.
https://www.calphalon.com/cookware/cookware-by-product-type/...
I did once ruin a seasoning making a tomato sauce, which was a way to learn about acidic interactions - but that was over hours.
FWIW I had a 5 qt like that calphon but found I was always using my enamel cast one instead, so gave it away.
One thing I really like about the cast iron skillit is you can treat it roughly and use it anywhere. Mines been in fire pits, on bbq, stovetop, oven, even a bread oven. Handles temperature changes without issues (unlike enamel and some clad) is unbeatable to sear things. Doesn't care what tools you use in it. Nonstick property is pretty good (better than steel pan, worse than teflon) and will still be pretty good in 20 years.
Deglazing itself is a very fast process, usually seconds. If you are doing something over an hour, it's likely simmering. If you did that in a sauce that was still acidic (rather than had some acid thrown in to deglaze or whatever) then I could see that being a problem.
I'm not super careful about not using acidic things in cast iron, and I do deglaze in it on occasion, it's just a little harder imho. I can see how my original comment reads.
Metallic taste/smell in beer is a pretty significant fault traced to untreated wwater, old equipment, or lipids in the malt.
There’s lots of stuff in Hoegaarden (and witbiers in general) that can be unexpected or off balance (e.g. coriander, lactic acid, orange zest).
Metallic, at Hoegaardens scale, would be quite unexpected
I wouldn't simmer an acidic sauce in cast iron for hours, but this is poor advice. Deglazing will not damage the seasoning on cast iron pan once it is properly seasoned (and maintaining that is easy, contrary to lots of what you hear).
Unlike to your experience, I don't find them functionally equivalent for a number of things, which is why I have both (and enamel cast, much better than almost all clad steel dutch ovens that aren't really expensive, as most of them don't clad far up the sides)