> a colleague of mine recently insisted that bittorrent be included in web3 techs since it uses hashing

Related pet-peeve: Folks who say "there's still great promise in private blockchains." This is equivalent to saying that self-balancing Segway-style devices can still become the dominant mode of transportation if we juuuuust make them bigger, enclosed, and add another pair of wheels so that they don't have to self-balance anymore.