Nah. If you’re a professional photographer you should have a DSLR. The iPhone takes great casual shots now, but can you imagine showing up to photograph a wedding and you pull out your iPhone? Lol.
Can you imagine showing up to photograph a wedding and you pull out your iphone to transfer all of your RAW shots from your DSLR onto your iphone with the camera connection kit? You could even pick out a few of them and send them to the bride and groom there and then. Wonderful for their Great-Uncle Tommy who now lives in Australia and is flying back tomorrow.