Do you think its a waste of time to get Kontakt ?

Good point!

Although from a consumers point of view it’s hard to determine what libraries can use the player and what libraries need the full version?
Also with Kontakt it’s not about ‘full’ or ‘light’ in the normal sense of the word that one would expect? Some major libraries can do with player while some minor need the full version? It strictly depends on the library itself and to what level editing is required? It also has to do with licensing between the developer and Native Instruments? Things we consumers want to keep clear off…

I found a list on NI but also here it’s not clear to me what exactly uses what?

https://www.native-instruments.com/en/products/komplete/samplers/kontakt-6-player/third-party-sample-libraries/?tx_nisamplelib_nisamplelib[categoryId]=28&tx_nisamplelib_nisamplelib[action]=index&tx_nisamplelib_nisamplelib[controller]=KontaktPlayer&cHash=84dfb23f687bf5f266c66354e263c546

Generally the folks making the libraries are pretty specific about full vs. player in the product description specs. But you end up having to search for that info on the various product pages. You’re totally correct that full/player is not the same as full/light - the full version can play any Kontakt library where the player version only play Player libraries which can be every bit as complex as any library.