General anesthesia does indeed seem a great way to go, have had it a few times. Haven't had a NDE per se, as in bright lights at the end of a tunnel etc. But there was one event which seems well worth sharing here:
In 2018 I had a medical emergency. Was waiting on my own for the EMS in excruciating pain for almost an hour. It was unbearable. After a while though a question popped into my head, why am I still doing this to myself? Had been miserable for decades and anhedonia had run rampant for years, so what's the point of suffering again and again for little to no joy? Couldn't come up with an answer. What followed was technically not a NDE, but I became extremely tranquil in that moment. The pain subsided, as did my worldly obligations, and nothing mattered or bothered me anymore. If this is it, I felt truly ready to go.
That event led to an epiphany two months later, which then again brought me here. Ever since that event I just can't get back into the saddle no matter what. Life has lost part of it's luster, irredeemably so. So even when I fall back into doubt, that event made it certain that when it's time to go everything will be fine.