I think param is a fundamental library…but I’m not aware of GUIs (except for holoviews obviously) using it. Not only GUIs but also simulator-type code. GPy has paramz which seems very similar.
There might need to be some doc comparing it with the observer pattern. I see param as higher level.
Does it need more publicity?
This makes me thing of this thread Is Param not the most powerful python library in existence? where I think you can find some answers as to why it’s not that popular. I think these days what is really holding it back is the lack of typing integration.
Well, that’s because param integrates what is commonly in separate frameworks. Visibility is reduced when one is only interested in one aspect (which is common).
You can functionally reproduce param if you know how to integrate the above.