That advantage is that you don't have to store the UTXO set. This could improve validation performance if you are RAM constrained, since you don't have to access the disk to load some part of the UTXO set you don't currently have cached in RAM.

What would be the advantage of using utreexo without pruning?

Scoresby

I would add that another trade-off of Utreexo is that nodes need archive nodes to do IBD. There is a distinction in Utreexo that nodes that only store the set of hashes can't help other nodes bootstrap. They rely on at least some nodes storing the full chain.

You don't have to prune the chain to use Utreexo.

bitcoin

"Really, though, it's all spam." - Tadge Dryja

> I would add that another trade-off of Utreexo is that nodes need archive nodes to do IBD. There is a distinction in Utreexo that nodes that only store the set of hashes can't help other nodes bootstrap. They rely on at least some nodes storing the full chain.

You don't have to prune the chain to use Utreexo.