The United States Postal Service cannot NOW deliver first class mail on a timely basis. We are still waiting for an important, time-sensitive piece of First Class mail sent to us OVER A MONTH AGO.
A massive mail voting scheme will be an unmitigated disaster and give the selection of the President to the House of Representatives as the certification of ballot results will NEVER take place by the constitutional deadline.
The House of Representatives is not bound to select a President from those who have actually campaigned.
As another FR poster wrote, “If people can safely go to Walmart, they can safely go to the polls.”
Or to their grocery store, or their local pharmacy....