If my understanding is correct, IPFS provides a way to only store files. Wayback Machine archives entire webpages, along with any CSS or JS (?) included. So building a webpage archival service over IPFS needs significantly more development effort.
You're absolutely correct. I wasn't commenting on the appropriateness or suitability using IPFS for the purpose of archiving webpages. I was replying to parent that there is an IPFS solution for the expired objects/dead links issue.