Nest is coming under fire following an announcement that Revolv, a smart home startup it acquired two years ago, would be permanently shutting off its product starting May 15th.

The decision, announced in a quiet note on Revolv's website in February, has gone largely unnoticed and is expected to impact a very small number of consumers. However, it does raise serious questions about the longevity of smart home gadgets. The devices are often costly pieces of hardware made by small startups that may drop support at any point after being scooped up by a larger technology company.