There are coated braids, and one is very cost effective - YoZuri.
I still don't fish them on my baitcasters, prefer working mono/fluoro, but with comparable-test braid as backing to increase the capacity.
E.g., I have 400 yds on this Tica Caiman 150, set up for offshore jigging, 300 yds 20-lb braid beneath, and 100 yds 20-lb Blue Label fluoro on top.
The 150 is basically the same spool width and capacity as the Abu 6000C.
This is also basically a reverse-engineered Abu with 10 ball bearings added including roller bearing anti-reverse. Something nice for a salt/trolling reel, it has a good pay clicker. Also interesting, a youtube takedown guy stated these were once made in Kent, WA before moving offshore to China mfg.
I bought the reel for inshore back-up, but have become so spoiled by modern reels that disengage the line guide rider during cast (Lew's), I hated casting 1/4-oz lures with it.
Didn't want it to go to waste, so set it up with a light jigging rod. The whole rig is surprisingly light in hand for anything offshore. And it casts 2-oz slow jigs great.
That was another reason I used the Millionaire 6H in the surf - it would out-cast spinning tackle with a 2-oz spider weight and another 2-oz of cut bait.
However, it would also free-shrimp with the best, so there's still an advantage to the casting brake adjustment in the old Abu design over the more modern Tica variant. Could also be the older design simply has two casting brake shoes instead of six. I've never fished a Calcutta, so can't say what Shimano did with it.
I do the same braid backing on inshore reels, here's 120-yd capacity reel upped to 200-yd by backing with YoZuri braid