Re: Dyson Sphere
Anybody capable of building a solid sphere as shown in "Relics" would definitely be way beyond the need to do so. A simple solar energy collector "swarm" would be a different matter, and perhaps indeed something of a stepping stone.
Perhaps Dyson spheres in the solar energy collector sense are part of the Star Trek universe as well, and simply happen to go by some different name? In contrast, the solid sphere clearly was completely unique, and apparently did hold the exclusive right to the name "Dyson Sphere" in the Trek universe...
When dealing with an alien civilization, expect the unexpected, don't think human.
The meaning of the apocalypse is the opposite of what most people think. It does not mean the end of the world; it means the revealing of hidden secrets and the beginning of a heaven on earth. The apocalypse is starting now.