A small set of Galaxy Note8 users seem to be facing an issue with the battery on their devices, due to which the device fails to boot up if the charge goes down to zero.
One of the threads started on the official Samsung forum is over a month old, but users are noticing the problem intermittently and have reported similar behavior from their device in newer threads too. Samsung representatives have suggested the users obtain a replacement for their smartphones or get it checked under warranty.
The issue certainly may not be as widespread as last year's Note7 debacle, but since there is no way to find out whether one's device is affected it could be difficult to estimate. Judging by the forum posts, the problem may not be linked to any particular batch of the Note8, as the users who have posted about it have devices from different carriers and configurations.
If your Note8 has suddenly stopped charging or booting up, it would be best to get a replacement while it is still in the warranty period and there's no physical damage.