If you haven't already seen the historical archives of IIW meetings and the Project VRM mailing list, they sometimes have in-depth discussions by recognizable names in the digital identity industry, including some with leadership roles on upcoming specs: https://cyber.harvard.edu/lists/arc/projectvrm & https://cyber.harvard.edu/projectvrm/Main_Page & https://internetidentityworkshop.com/
If you haven't already seen the historical archives of IIW meetings and the Project VRM mailing list, they sometimes have in-depth discussions by recognizable names in the digital identity industry, including some with leadership roles on upcoming specs: https://cyber.harvard.edu/lists/arc/projectvrm & https://cyber.harvard.edu/projectvrm/Main_Page & https://internetidentityworkshop.com/