HUH? Apple promoted this feature big time and what we got in the 1st month was 2, maybe three printers that you could use. That's not what they initial said. They told us that you will be able to print to any printer. Any doesn't equal 3. Now remember, if you are familiar with Apple? Their computers come with drivers for printers or your Mac can locate the "updated" driver on the web. If Apple is able to do all that then they can do that with the drivers for their iOS devices. A lot of the major manufactures (HP, Canon, etc) have drivers inside their printers that you can use this print feature.
This whole thing reminds me of when you could send SMS text from your Mac through your mobile phone. Some Verizon phones you couldn't do it because the feature was turned off. But the same phone on AT&T you can do it.
Apple has a lot to do with it. Sorry but they do. Right now I can print from my Macbook to my Canon Printer. But I can't print from my iOs device to the same printer. smh. #badapple
Oh to add ... Siri out of Beta Mode