Isn't that just for the default dedup implementation where it's suggested to have 2-5GB per TB? HAMMER fs can dedup with little RAM, but the ZFS devs aren't ig

Isn't that just for the default dedup implementation where it's suggested to have 2-5GB per TB? HAMMER fs can dedup with little RAM, but the ZFS devs aren't ignorant or uninformed, so I would expect them to have a plan to remedy the inefficiency of OpenZFS's dedup implementation. I know there are commercially avaialbe alternaitve dedup versions, but I don't have any experience with those.