Some of our client organizations would like to have the ability to add a custom URL.
Instead of: https://experience.arcgis.com/experience/c0ce74933f0e4a58804e71271c3c3f51
They would want: https://ClientCountyGIS.org/experience/c0ce74933f0e4a58804e71271c3c3f51
Hub sites have this ability. It would be nice if Experience Builder had it too. It has been requested by several clients we build AGO ExpB sites for. Developer Edition is not a viable workaround for us.