They are sleeping just fine, don't worry about them. Heck some of them have no worries about honoring any long term warranties... how can you worry about something you have no intention of doing? Furthermore, there is probably a hedge bet that the very companies that are installing this stuff will not outlast the products they are putting in the ground. A warranty is great, as long as there is someone there to manage and administer it for you. Did you know that you can actually buy warranty insurance? For a moderate monthly expense, you can protect your operations against the cost of warranty claims. Not sure who uses it, but it does in fact exist.