Adding 2¢'s worth to the Dictation problems thread
I have searched everywhere for this online, and I have not seen anyone else report this. I'm a writer, so the Dictation utility is very important to me. Occasionally, it will pretty faithfully allow me to dictate perhaps three or four lines – and then suddenly Dictation starts deleting every word from the last word until it gets all the way back to the first word, and then it puts in "yes yes yes yes yes". Pretty funny, maybe, but immensely frustrating if you're on a roll and the thinking apparatus is working well and you're actually liking what you're dictating! I agree with other posters that each OS update seems to contain more fluff and less utility – and it doesn't matter whether we're talking phones or desktops here.
MacBook Pro 16″, macOS 10.15