One great example/case for this would be Aura Frames (recommended to me by a few folks here when I posted an Ask HN) [0]

If the company disappears... what happens to the devices and the cloud storage?

I've been really enjoying the product (it's really well done, the mobile app works perfectly well) but it's a scary thought.

I also found this Reddit thread [1] with some language from the company supposedly saying they would do their best to launch alternative tooling if they disappeared, but I can't find this language anywhere else online.

[0] https://news.ycombinator.com/item?id=45341781

[1] https://www.reddit.com/r/homeautomation/comments/1b8vei3/wha...