I can't find it too, maybe it was just a post in one of someone else's topic, but the "shower thought" behind it was not essentially a tail emission, but a soft fork to decide, yes or no, to a hard fork for maintaining the block rewards by cancelling any future halvings. For example a hard fork, starting on 2048 block rewards are maintained to be at BTC0.04882812 per block until all the coins are mined, cancelling all future halvings.

I'm trying to find it. I found another post of mine, posting about it, but I can't find the original, https://bitcointalk.org/index.php?topic=5357973.msg57847458#msg57847458