I just received the message by logging into ChatGPT. I'm trying it now and I have to say that the first feedback is really excellent, especially regarding the speed of responses. I reserve the right to do some more tests :)
I've been testing it with text content creation/editing, and I've noticed a drop in quality. It seems like their push to increase speed and cut prices for the masses might be leading to compromises on quality to keep their own costs down.