Utreexo makes it attainable to make use of Bitcoin securely with out downloading the complete blockchain. Since some distinguished Bitcoin Core devs assume there are usually not sufficient full nodes, I speculate that some could not just like the prospect of much less full nodes (much less decentralization), and additional extra, extra code complexity.
Additionally, Utreexo remains to be in growth.
Additionally, because it requires no forks, so there isn’t a strain to combine it into Bitcoin Core. With so many different wallets, a developer actually has little incentive to work with the Core neighborhood when he might get it merged right into a one other pockets (his personal :P) with certainty.
Take BIP 157/158 for instance. Everyone knows code overview is nice, however I speculate that many builders can be discouraged from the quantity of effort it takes to get one thing merged. When you’ve got one other pockets, as roasbeef does (btcd), I can not blame him for not eager to trouble with bikeshedding a Core PR for months, leaving it as much as Jim Posen to see this by.
I speculate that Utreexo solely exists as a result of Tadge realized that the one approach to get one thing like that is by doing it in a means that requires no modifications to Core. There have been many UTXO-commitment-related proposals, for instance Bram Cohen’s proposal, which is arguably means easier, however was too radical a change. Now the person is beginning his personal coin.
Be taught to simply admire the truth that Core is getting increasingly secure!