It is. Some of them are getting snapped up to help with powering factories.

I think this is car companies using the incoming battery packs from replacing worn out packs. Time to look it up...

https://www.autoblog.com/news/toyota-just-found-a-clever-new-use-for-old-ev-batteries

This is the article I was thinking of. It's more of an idea than a common use case to use old packs to help power factories.