Regarding technical feasibility: I don't think the Fed has a system ready that could handle the amount of transactions and record keeping necessary for a system

Regarding technical feasibility: I don't think the Fed has a system ready that could handle the amount of transactions and record keeping necessary for a system which is accessible to the public. They would need to buy such a system. But more importantly so called narrow banks are not in the interest of regulators and the current financial system. If customers could directly deposit at the Fed they would likely disintermediate regular banks (which leads to a bank run) and prevent them from doing their central function in the financial system (issuing credit). You would have to rethink the financial system and regulators are wary of such big changes. Matt Levine has a great article about it: https://www.bloomberg.com/opinion/articles/2019-03-08/the-fed-versus-the-narrow-bank https://www.bloomberg.com/opinion/articles/2019-03-08/the-fe...