How long can an Apple HomePod, Amazon Echo, Google Home infinite loop last?
https://www.cnet.com/news/how-long-can-an-apple-homepod-amazon-echo-google-home-infinite-loop-last/
So we decided to create an infinite loop, meaning we set up reminders and calendar alerts with the trigger words, like "Hey Google," to set off the smart speakers in a continuous sequence. (You can read more on how we did that here.)
In theory, this would go on for infinity, but we know there's no chance of that happening, thanks to things like Wi-Fi dropping out.