It's literally used to tag transactions with data. It's still bloat. But it's pruneable.

The biggest risk besides the bloat is the same as with ordinal inscriptions though, what @theariard underlined: "value" that is not native to the L1. However, its debatable if that is prevented with 80 bytes - counterparty still operates on 80b today and your rare pepe transaction with exactly that externally perceived value "fits" in there.

People will abuse it. It will hurt. Will that hurt more than abuse of data structures in practice? Probably not, because ordinals already does this anyway.