Yes... there are NOIDS in my garden.
A couple NOIDs I have were simply purchased without ID. But most were purchased but the wrong plant was delivered. The latter I prefer to dispose of as I consider them impostors, through no fault of their own. The ones I bought with no ID attached... I did that knowingly by my own choice.
Semps are the only plant that I have ever collected, at least to such a large number. It's the only plant I have bothered with labels.
I do keep some NOIDs but I admit that I prefer not to have any more going forward. Knowing what I have, and what I'm getting, and what I'm giving is now a real consideration. Of course if I saw something that I really wanted with no ID on it... I'll make an exception.
Another issue is that I may (ever so) occasionally get rid of a cultivar that I feel is not performing, or just is not my cup of tea. I want to know its ID so I don't repeat the experience.
Having said all this, the one cultivar that I selected from which to make a large colony, is in fact a NOID. I chose it because it looks great, performs in this relatively shady area, holds its color all year, and seems like a shy bloomer. I'm talking about the little Calcareum starts you can see in this picture. I am hoping for them to grow out and expand in the same way its "parent" did. So far, they seem to be on their way.
And BTW, the red one in the center is also a NOID.