Hi @TuneMaster.

Welcome to the Sonos community and thanks for bringing this to our attention. We highly appreciate feedback and feature requests to help us better improve our products. Let me help out.

I would be more than happy to send this toup to take a look into. Just to set your expectation since you will not be contacted directly for any updates and or progress on your feature request,  I would highly recommend keeping your Sonos products and Sonos app up-to-date to receive the latest features, releases and updates. 

Please do not hesitate to reach out if you have further questions, additional feature requests, or concerns. I’ll be here to help.

Thanks,

Sonos has no idea of the “date added” for any music, so sorting by that is not technically possible, even if Sonos added sorting (which they have never done on any criteria).

You can merge playlists by doing;

• Clear queue
• Load playlist 1
• Add playlist 2 to the queue
• Save queue as new playlist

Obviously doesn’t help with dupes.

Honestly, I don’t understand the refusal to sorting.  I think it would not require much work for sonos to add the dates ( of files added to a file share) as metadata to the library.