what even is a leading mint?

Minibits is a wallet, and it kindly also hosts a mint which you can opt into connecting with. Just cause it is popular as a mint choice does not mean it has the infra to support hundreds of users using it like an LN wallet...

In future we might see mints that can give 'assurance' that your 100k LN payment will not bounce/have channel capacity. Minibits makes none of those assurances, you are projecting the LN usecase onto a ecash.

Not wanting to sound obnoxious but ecash does not fix all the things. LSP and liquidity provision is a problem with lightning that is being inherited.