I thought I felt my ears burning...
Guys, the bucktail twin spin, as you know, is one of my absolute favorite lures. However, like any other lure, it's a tool that doesn't always fit the job. It's at its best in clear, warm water, where you fish it fast and just under the surface. On the clear Ozark streams, it's a deadly summertime lure, much better than a typical spinnerbait, but in colder water or when you need to go deeper I prefer a regular spinnerbait, and in really murky water the typical spinnerbait with big thumping blades will usually outfish the twin spin.
As for bucktail itself, I make some regular spinnerbaits with bucktail, but I'm not convinced it's any better than a silicone skirt. It might work better at times because it does give the lure a different profile, and you can tie it using color combinations that might make it look more like some kind of baitfish--I tie them with olive green bucktail on top, gray and a bit of chartreuse on the sides, and white or cream on the bottom, to match a typical minnow color. Not sure it works any better but it looks pretty.
In fact, even on the twin spins, I know guys who just use a bare Nugget twin spin with a curly tail grub, no skirt at all, and do well. I think the bucktail adds something, but I've used some of mine until most of the bucktail was worn off and they still caught fish like crazy--as long as they had that curly tail grub. So I guess I kinda think the grub trailer is even more important than the bucktail. I practically always dress ANY spinnerbait with a grub trailer--but my dad doesn't and he catches fish like crazy on the typical trailer-less spinnerbait. Go figure.