JiffyPopTart
Bree-Yark
But you would not need a mobile phone with sending magic, would you?
You also wont need explosives and firearms if magic can do that for you.
Yes and no. You don't really need the incredibly complicated crossbow in a world where you already have well made shortbows...but yet they were developed. The reasoning for the new technology is as varied as the different forms the new technology takes.
You don't NEED a good camera in a cellphone, but yet now every new cellphone as a great camera in it and nobody buys low-end digital cameras anymore.
You don't NEED an electric car, but some people find the electric car help protect the environment.
You don't NEED to step foot on the mood, but lots of money has been spent to go there and pick up some dust and rocks.
You don't NEED to build a functioning binary computer in Minecraft but someone spent the time to see "if it could be done".
Progress is just progress and it happens for reasons up to and including "I just wanted to see if I could do it".
I'd almost make the argument that if the greatest of the Dwarven smiths is making a sword the same way they learned how to do it 500 years previously they really aren't that great of a smith....they are just a well built machine.