A lot of people seem to be misinterpreting the headline given the content of the article:

It told Restaurant Business it was testing whether the voice ordering chatbot could speed up service and that the test left it confident “that a voice-ordering solution for drive-thru will be part of our restaurants’ future.”

This is just saying that they are ending their 2021 partnership with IBM for AI drive thru.

Not that they are abandoning AI for drive thru.