…but remember that these DNG files contain a much higher quality image than what you see in JPEGs coming from the default camera pipeline which is simple and fast rather than good looking, and you can use these DNG files to get better JPEGs afterwards (see Glowup for an example of this, and more photos here).
So if you care about these photos, you may want to archive them somewhere instead of deleting. They should compress fairly well too.
(replies to this got split into a separate thread, so go there if you want to reply)