Sheesh, just use BitTorrent. That's what open access licensing is for! BitTorrent's tit-for-tat approach limits the harm selfish actors can do, only greatly rewarding those whose behavior benefits others, and has been shown to be very robust against active disruption attempts for decades now. Moreover, it also confers some resistance to falsification of the published record, to linkrot, and to publishing companies go…
torrents are a problem for mutable artefacts because you are reliant on your peers having the latest up to date copy, which is not guaranteed. the peers you download from might have just switched their machine on after 5 months, so their copy of the mutable artefact is 5 months out of date. as ever with distributed systems, requiring consistency introduces complexity.
"open gateways" (term used by a sibling comment) provide much simpler mutability. which makes sense when there's like a simple typo in a PDF document that requires the document's replacement. just replace the document on the web server. bam! everyone now has access to the latest corrected version immediately.
also, most of the general population doesn't know how to use torrents. just because there's a part-way technical solution, doesn't mean it makes sense to switch everything over to some fancy new proposal (not the underlying tech, which is old now).
if users would struggle to use the implementation, why do it? what benefits are there except for a seemingly more technically perfect solution?