The article also talks about the USPS's role supporting e-commerce businesses. I don't buy it. E-commerce businesses use a number of other delivery services, and I don't buy the idea that they would fold if the USPS went away. The USPS is just one of many options for them. The majority of the stuff I buy online is delivered by UPS and FedEx, and Amazon drivers.
There is substantial demand for delivery services, so much so that multiple for-profit companies including UPS and FedEx are able to survive without government help. If the USPS is having trouble thriving in that environment, it must be doing something wrong.
I'd like to see an argument for saving the USPS that does not depend on nostalgia.