I’ve also seen a great idea (in my opinion) proposed a few times that we should allow searching by multiple tags. For example, maybe I want to see posts tagged with both “photography” and “animals”, or with “cryptocurrency” and “funny”.
Since the current community tends to talk about some tags a lot more than others, the ability to exclude certain tags in views/searches might help with discoverability, for example "news without cryptocurrency".
Now that is awesome! I would totally use that all the time!