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> V2G is a pipe dream.

Seems a bit early to come to this conclusion, but I would also suspect, that the value of a parking garage full of EVs is not in providing energy to the grid but as a large scale consumer for load shaping.

Seems like an easy solution would be for the car to provide energy for the house, rather than the entire grid, and reduce overall load.

Not too much of a difference if the house is connected to the grid.

What do you mean? If the house takes less energy from the grid (compared to doing nothing) it's effectively the same as if the house uses the same energy while also feeding the grid with the car's battery. The former, however, takes less additional infrastructure.

It means you don't need any mechanism to compensate the vehicle owner for using their battery.

Oh yes, the return on investment is very convincing for most of the big companies! Like Uber: https://uberlosses.com/