First, let us examine Mark Nottingham's IETF independent submission, RFC 9518: Centralization, Decentralization, and Internet Standards. Mark Nottingham has a long and respected history of participating in standards, and most of his work history is doing so for fairly sizable corporate participants. From the title, one might think it a revolutionary call-to-arms towards decentralization, but that isn't what the RFC does at all. Instead, Nottingham's piece is best summarized by its own words:

This document argues that, while decentralized technical standards may be necessary to avoid centralization of Internet functions, they are not sufficient to achieve that goal because centralization is often caused by non-technical factors outside the control of standards bodies. As a result, standards bodies should not fixate on preventing all forms of centralization; instead, they should take steps to ensure that the specifications they produce enable decentralized operation.