The Sad Story of OAuth 2.0 and Open Standards

Related ongoing thread:

Why is OAuth still hard in 2023? - https://news.ycombinator.com/item?id=35713518 - April 2023 (129 comments)

Last updated March 22, 2016.

The repo for the "OAuth replacemen" was archived Apr 16, 2019.

Not much to see here. The sibling comment referring to the recent HN discussion is a better resource, IMHO.