If it were about become-independent-and-never-pay-electric-bills again there would be potential for a much wider adoption. But the save the whales perspective just doesn't work especially for many in the single-home-owner areas.
(And the kernel of truth is that the grid itself is pretty close to capacity in a lot of places, so decentralized generation, even if it costs per-KWh more than centralized, defers or avoids huge capital costs in upgrading the grid, lowering cost overall. That works even if it's cogen with gas turbines vs. something like solar or wind. The subset of crazies on the pro-renewable/green side never remember that the capital equipment also has embodied energy costs/pollution, so avoiding spending on that also is a win.)
On a small scale this is do-able, but not on a massive scale.
It is a popular verbal feat by the fossil fuel energy industry to state: "Yes, but we can't go 100% because of x.", to chill the discussion and the momentum of renewables.
I will buy a Tesla as soon as I can afford it, and it has nothing to do with a desire to save the Earth.