@icedquinn for the last 20 years it's bugged me that there's no real multi-pass compression solution; however there's headway made with ML compression, zip does 1gb wiki dump @ 300MB and current SOTA is 112MB using "AI" whatevers.
If i had to store stuff on tape, say, i'd dedupe and try to force the "already compressed" stuff to the end of the archive. then i'd have to start googling what the SOTA is. I'd also parchive onto a blu-ray just in case.
the wiki thing is allowed 50 hours to unzip!