Earlier quoted context omitted.
The tech for instant tranfers is already there, they just charge ridiculous amounts for it. Eg. my bank charges 7€ for an instant transfer, slow transfers are free. This proposal would make all transfers free and instant.
It's impossible to make anything free. The likely outcome is the costs will be moved around so that its paid indirectly.
They are just trying to make a quick profit.
Just like card payment processing fees, this is a case where banks are overcharging for a service, and the EU will fix the situation.