Someone whose opinion I rate says, when people ask him if they should fit a slipper, he asks "Do you find the rear end "chatters" when you're braking into a corner (on road or track)".
If the answer is no, or "I don't know what you mean", then, they don't need a slipper clutch.
Sounds like good sense to me.
I'd have thought, for the vast majority of people, a converntional clutch is best for road use.
If it's just a track-day tool, then that could be different.