I’m afraid there won’t be one replacement for WordPress, because it has so many applications. The pure blogging aspect could be substituted by Writefreely, more advanced users may go to Ghost, and I’m not sure what small business and corporate websites will turn to?
I think this is probably the best solution. All the power shouldn’t be centralised.
Yup, Matter is just the evolution of ZigBee. It’s not where it needs to be but it’s going in the right direction.