IMHO, the 737Max should be forced to serve in non-passenger service - e.g. courier shipping - for a number of cumulative flight hours (e.g. 5,000) before it goe

IMHO, the 737Max should be forced to serve in non-passenger service - e.g. courier shipping - for a number of cumulative flight hours (e.g. 5,000) before it goes back to passenger use. Given the huge rise in shipping during the holiday season this criteria could be satisfied by the end of the year.