MimbleWimble on Bitcoin As you know the Litecoin implementation of MimbleWimble on extensions blocks is already running on testnet. They will go mainnet in a year. I think this could be a great improvement for Bitcoin. We could use Bitcoin for private transactions when required, no need of coin mixers or Monero anymore. Exchanges like Coinbase will not delist Bitcoin as they already have ZCash which have public and private transactions too.
In the rare case there is a hidden inflation bug, new coins created in the extension block can't infiltrate the canonical chain because the amounts are public, so the bug would be detected sooner or later when someone can't send back his coins to the canonical chain.
The developer has said he's going to write a BIP and make a pull request to Bitcoin. What are the chances it's approved?
Regards
There is zero chance of it being used in Bitcoin.
There is prior incidents to gain wisdom from. Before zcash existed as an altcoin, zcoin was an implementation of a similar concept which people rallied behind and tried to ham fist into Bitcoin. It's essential, it's a mandatory, it's my right to be private! If you don't put zcoin into Bitcoin you are the manifestation of the devil himself, brought to destroy the fabric of society!
Unfortunately whenever things like this have been social pressured into existence for reasons of perceived valor, it has lead to problems. In the case of zcoin, it was later discovered that the implementation of zcoin slated for use in Bitcoin had an unbounded, invisible inflation bug which would have instantly ended the currency.
Bitcoin survives by being conservative with changes, not grabbing onto everything shiny.