“When <cloud-connected device company> shuts down, will their <product> still work?”
Cars are a particularly problematic example, because they have a long life and are expensive, but generally-speaking, I think that when someone buys a cloud-connected device, it’s a good idea to think “what exactly is going to happen if this company goes under and stops providing online services, or just discontinues service at some point” at the outset.
Might be cars or smartwatches or live service video games. They all run into similar issues.