SolarCity and Tesla made more surface level sense just being in the same general vicinity since they're both fundamentally green energy companies. That made it easy to spin questions about the financials with some CEO-speak about synergy.
However, the way Musk has become less subtle with this tells a story. He got away with these shady financial dealings multiple times so he's now becoming even more brazen and transparent with this behavior. We have gotten to the point in which the spin needed to justify his moves is the physics-defying viability of datacenters in space.
The distortion field will keep growing as long as he keeps getting away with it.
Which is why he's the GOPs bank now
Doesn’t Tesla have a large and profitable storage business now? Probably could have just built that instead of buying SolarCity.