From the perspective of physical capabilities, our obsolescence may already be at hand, but what becomes the purpose of AI if it has nothing to serve?

"Btw, if you can have an engaging conversation con with a bot, does it matter if it is a bot and not a human?"

Perhaps not to you, but it is relevant for the other party in the conversation, I suppose - if they have no need of human contact, one would expect them not to value the process.

"Either way, the bots are running wild in Steemit, it would be nice to have a test to check if someone is a bot before commenting, flagging and voting,"

Yeah, this would probably take too many resources to be practical, as you suggest.