Apple moved to the Internet Printing Protocol (which they brand as AirPrint), just as Google did (after they killed Google Cloud Print) and Microsoft (branded as Universal Print).
The last thing Apple did with CUPS is add functionality to allow legacy printers that don't natively support IPP to function as an IPP printer.
>Products using the Internet Printing Protocol include CUPS (which is part of Apple macOS and many BSD and Linux distributions and is the reference implementation for most versions of IPP
The last thing Apple did with CUPS is add functionality to allow legacy printers that don't natively support IPP to function as an IPP printer.
>Products using the Internet Printing Protocol include CUPS (which is part of Apple macOS and many BSD and Linux distributions and is the reference implementation for most versions of IPP
https://en.wikipedia.org/wiki/Internet_Printing_Protocol
Going forward, the Printer Working Group is in charge of IPP, and the creator of CUPS now works for them.
https://www.pwg.org/ipp/