AnotherGuy
Hero
Disagree. Besides death there are a number of loss conditions to be explored...fictional and mechanical.That's an utterly terrible idea. It totally destroys any tension caused by dangerous situations.
There is an entire line on DMsGuild which is perfect for post TPK scenario - Doomed Realms. In fact I've used it as a precognitive element (via an ever changing map of the future) should a TPK actualise.