EDIT: Follow up question: Is ID.me a shim until there's traction for the USPS to perform in person identity proofing [1] [2] [3] versus ID.me's remote proofing?
[1] https://about.usps.com/publications/pub364/ch12.html
[2] https://www.cfr.org/report/solving-identity-protection-post-...
[3] https://static1.squarespace.com/static/5a7b7a8490bade8a77c07...