I don't like this. It forces me to read 2 prompts instead of 1 so that I can help train their LLM. ChatGPT and Bard already have regenerate buttons if I don't like their response, it doesn't need to be that in my face.
It forces you to remind yourself of the stochastic nature of the model and RILHF, maybe the data even helps to improve the latter.
I liked this trait of Bard from the start and hope they keep it.
It provides a sense of agency and reminds to not anthropomorphize the transformer chatbot too much.