I'm pretty sure that GPT-3 and statistics-based approaches to bots aren't going to be truly convincing anytime soon. But there's another definition of "chatbots" that consumer-facing brands use every day to triage questions, attempt to answer them using good but not mind-blowing ML, and then escalate to a human being if/when the problem can't be solved. There is already a thriving market for these "dumb" bots that aren't attempting to have an uncanny valley type conversation - they advertise that they're bots upfront, don't try to be too cute, and provide the escape valve to a real agent when necessary.