It still requires the device to be capable to print…
And the user to find the printer select it and so on. And must expose more ports on the network beside 443…
So, indeed cups is a great solution, but not to the problem I want to solve.
I do use cups in fact for the trusted part of the network, driverless printing for windows and Linux. Android doesn’t even need cups since it picks up the printer directly from the printer itself (AirPrint or whatevee that’s called).