As you say, there’s a fine art of product management to include features in such a way that they can attract the largest audience. If a feature is only going to be of use to one customer currently and you cannot see further adoption in the future, then I’d be really careful. One exception quickly leads to ten…. and you need to continue to support that feature for the duration of the lifespan of the platform. At very best, it’s most likely not a great investment.