Change in question merged to ezplatform[-demo], ezplatform-ee[-demo] and ezcommerce repositories:
https://github.com/ezsystems/ezplatform/commit/685e1b91820d3cb6b11ef9c069da795653085a89

Which enables this setting and sorts packages in our meta repos:
https://getcomposer.org/doc/06-config.md#sort-packages

This needs to be documented, as it will mean bigger conflict then usually on first upgrade where this change occurred, afterwards it should be simpler to keep in sync for all future updates on 1.x and 2.x.