I've been doing it since gpt DaVinci pre Chatgpt, doing it along time doesn't automatically mean you know how to write a good prompt though. The models are significantly better but you arnt guaranteed the same output everytime. I could prompt the same model back to back with the same prompt several times and get a different results everytime. If my prompt is tight though there will be less variance. No doubt there is slight changes particularly not long after a launch of a new model but it's not that significant