"Officially support" printing without internet connection?
Was this explicitly documented as a feature or did this just "happen to work" as you expected?
A lawsuit may have some leverage to find that something could have been "reasonably expected" to work in a certain way, but that's quite uncertain territory.
i.e. I would expect an Apple Watch to also work with Android Devices, but this was never officially supported by Apple and it's arguable whether it was reasonable for me to even expect this.