I think the analysts start to realize that Tesla has an awesome business model for the afterlife of batteries.
Lets say you get a new battery after 10years, so you have your old 85kw battery, lets assume worst case and it has 40kw capacity left.
those 40kw are bad a a car battery, but as a local grid storage for a solar house that tries to balance its peak consumption it will be almost an overkill.
So the Batteries would have a second live, notice that the batteries packs have awesome logistic capabilities, there are complete and can be attached to their new home in a matter of hours.
It would be definitely more profitable to use those batteries for a second live instead of recycling them. So after a second life of about 10years Tesla can finally recycle them.
And since Tesla is working in a close cooperation with SolarCity it will have a much better access to the market of grid storage.
To be honest I also only recognized the implications of this in the last couple weeks, before that I was always thinking that grid storage is a small market for straight out the factory tesla cells, since its not price competitive. But as SecondHand batteries it becomes an awesome business.
Such a long live cycle also means that the Integrated Recycling facility in the Gigafactory can wait for at least another 15years, thats when a huge amount of batteries will come in that already had a CarCycle and a GridCycle behind them and are ready to be recycled.
Before that there wont be to many Tesla Batteries packs to be recycled, the amount will be so small that it can be done by some small company.
That is brilliant!