What I notice is that many hybridizers register plants that to my eye are almost the same, with only slight differences. I am always surprised by this, but now I just chalk it up to "this is what people do". So to buy an entire collection, I would have to be impressed by the true quality and variety being presented.
Looking at the daylily sales page on FB, I also notice that there are a ton of gorgeous registered plants that I have never heard of. However, many of them are almost indistinguishable from plants I am familiar with. Were these part of a collection initially?
How much of this practice of collection buying (would you say) is related to groupthink/social networking reasons vs. purchasing plants that would actually build out an interesting garden or forward one's hybridizing goals? That is, do we acquire positive social cachet from being able to say that we bought someone's entire collection, if that someone is a popular hybridizer?
And, I think that Bass Gibson and Forestlake Ragamuffin are still very interesting, considering the ways they continue to be used!