How long do IoT devices last?

I'm curious to know, how long can we expect IoT devices to last on average? Are there any factors that can significantly impact their lifespan? Do manufacturers provide any warranties or guarantees for their IoT products? And what about the software and firmware updates - do they play a role in extending the lifespan of these devices, or could they potentially shorten it? I'm eager to understand the full picture when it comes to the longevity of IoT devices.