Aussie Enviro

The article is talking about Tesla's home batteries, not their EVs.

In terms of EVs and vehicle to grid, I think people will have to crunch the numbers to see if it's worth it, and that will likely depend on how the future electric market is designed, whether they can tolerate reduced range, how often they replace their cars etc. In the short to medium term, some might decide that exposing themselves to the wholesale market through Amber Electric or similar may be worth it, although there is a lot of room for improvements on all fronts.

Although I suspect EVs will become so cheap that people will be willing to risk some amount of degradation, and if nothing else, people could use their old EVs exclusively as batteries, once they are no longer useful on the road.

Depends.

If you have, say, a 75kWh battery, that's 3-4 days of average summer usage in a large house.

So if you use it to shave off peak usage costs from 4 to 9 pm and then you top it up off peak again from 1 am to 6 am, you cycle through about 10-20 percent of it's total capacity. If you kept doing this in the mid-range of your battery , like 55-75 percent, it would have a negligible effect on battery life.

Vehicle to grid would be great during short blackouts — no need for a permanent battery and you can keep the lights and fridge going.

I suspect it probably would. But shouldn't that be the user's choice to make?