Alternatively, if the Physical Web project is being retired, this project's documentation should be updated to reflect that. As-is, it's just confusing to developers right now.
Came here and had the exact same experience as @dweekly. Perhaps add some indicator of the lifecycle state and whether this is still recommended for new development. Thanks!
There are several links in this project to https://play.google.com/store/apps/details?id=physical_web.org.physicalweb which seems to have been pulled from the Play Store. These links should be updated or removed.
Alternatively, if the Physical Web project is being retired, this project's documentation should be updated to reflect that. As-is, it's just confusing to developers right now.