I used to cast a Penn 113H with the metal spool for cobia---from a boat. No joke. I had to send my thumb off for a post-graduate degree, but I could do it. The reasoning back then was that we (the charter boat captains) had to hand the hooked up fish to some inexperienced client who was apt to break off or otherwise screw up a fish hooked on lighter tackle.
Don't get me wrong---if I had the opportunity to go back, I'd use spinning gear in a New York minute, but back then, it was viewed as untrustworthy by the old captains who taught me. Lots and lots of advances in tackle and knowledge since then.
Now, I only use casting reels for sheepshead, bait fishing and bass fishing. Not for anything really important to me. I hate backlashes (professional overruns) almost as bad as I do wind knots.

