I am still waiting for the replacement battery for my 2016 Nissan Leaf. It’s nearly 9 months wait now.
Given that I haven’t heard anything from the dealer, I contacted the Nissan USA customer service. The arbitration department reached out and offered me a buyback. They haven’t showed me the numbers yet, and I am looking forward to seeing it.
It seems that many people have a similar experience. According to this post, a person waited for 6 months and got an upgrade to 40kWh battery. I believe the original 30kWh batteries are no longer manufactured, so if I do get a battery it will likely be 40kWh.