Yes, there can be cases. Though many of them can be addressed with encryption, e.g. just creating a two factor auth. The added threshold part is often not eas

Yes, there can be cases. Though many of them can be addressed with encryption, e.g. just creating a two factor auth. The added threshold part is often not easy to justify vs, something like having two factors (data and key) and backups of each. It's also the case that my link is specific to Bitcoin where there are really good alternatives.