The end of the first link provides a response from Bernanke which says that the public would still have access to the data but the fed won’t aggregate it and report it. What the OECD does is the aggregation and reporting based on the raw fed data.
The second link provides why the M3 was useless to begin with.
https://mises.org/library/death-m3-fifth-anniversary
And
https://www.garynorth.com/public/6538.cfm
TLDR:
The end of the first link provides a response from Bernanke which says that the public would still have access to the data but the fed won’t aggregate it and report it. What the OECD does is the aggregation and reporting based on the raw fed data.
The second link provides why the M3 was useless to begin with.