The ability to install the connector on a Linux server for use with legacy printers would be nice. In cloud-only environments, there are no servers on-premise or always-on PCs to install the connecto...
While I am disappointed as well, I think Microsoft's position is that partners offer appliances that do enable legacy printers to work with Universal Print without installing the Universal Print Connector, and Microsoft shouldn't undercut those partners. https://www.thinprint.com/en/products/thinprint-hub/ is one such example.