DRM is only evil if it restricts you from using material in a way that you paid to use it. Movies handled it a lot better than Music, you can take a DVD you bought and use it on any device, what you can't do is make a copy of it. There is an added restriction that you have to buy it in a "local" market, but generally the restrictions are transparent to you - unless you want to break your license and make copies. Music on the other hand they tried to limit what device you could play it on, or have you jump through hoops to validate that you had paid for it repeatedly.

DAZ had always had DRM on their plugins - they all require a key to activate them. And they can't restrict the program to using only their content because then nobody would be able to create content even for their own use. The question with their DRM implementation, and there is no way to comment until it actually comes out, is if there are any restrictions it places that would preclude you using it in the (licensed) manner you have paid for.

Frankly I think all this discussion of DRM is overblown. My main worry about DAZ's plan was it might change how I locate my content, that has been addressed. The fact that version 4.9 still hasn't been released would seem to indicate they are still trying to work out the details so they don't have a mess on their hands at launch.