It's July, they just needed to put a voice interface on ChatGPT, it'd easily help them sell more pro licenses as well. I'm not a conspiracy person, but this just seems so obvious it feels like there's something else going on here.
The official ChatGPT app has had voice-recognition for a while now. Still not closing the obvious loop with text-to-speech, but probably they have bigger fish to fry. It might be that the projected extra subscription revenue would not make such a big difference in the rate at which they burn through capital.