Maturity Transformation vs Financial Intermediation
All banks - including FULL RB banks and MMMFs - engage in financial intermediation.  FRBanks engage in maturity transformation.  Any talk of financial intermediation - even if cited - needs to be put on another page as that is not what FRB provides.  FRB is about maturity transformation, not financial intermediation.  Please stop swapping MT for FI.  They are not the same, and FRB is just an example of MT.