Most people still use stir plates here. It does work. I got back into brewing after a few years off around 2019. I got rid of a really good stir plate, but they weren’t available anymore, so I bought a cheap kegland one. It works ok but it is noisy as hell, so I just used the flask with the “swirl when you walk past method” which works quite well. Like most things in brewing, there’s more than one way to do it