However, it's satisfying to be able to smugly watch/listen to content that becomes unavailable due to it being old or unpopular or even complicated by rights issues.

Just yesterday, I was watching Digging The Greats on YouTube, discussing De La Soul's Three Feet High and Rising. He can't even recreate the beat/mix on YouTube as it would get flagged for copyright. It was unavailable for streaming/download until 2023 due to licensing issues.

My go-to example of disappearing media is the third season of Monkey Dust that ran into problems with music licensing and so it was never available on DVD and will never be screened again. (Available through nautical methods)