On one hand, I'm excited for the possibility of a completely self-hosted and local Mint alternative. On the other hand, this bit is concerning:

One of the biggest areas of growth is in credit assessments. Under open banking, lenders could directly access an individual’s banking data, so they can look beyond credit scores. Consumers can also use it to build their credit scores, for example by proving reliable rent payments.

If this comes to fruition, it'll likely become mandatory for everyone to provide this data when applying for loans of any kind or to rent some place. Hopefully, they'll have something set up so that you can share specific transactions instead of having to share everything.