It worked great, particularly with split screen. Specifically, I had a workflow where I would look at a PDF and then dictate comments about it at the same time using the Dragon Anywhere software. For years I gladly paid $14.99 a month to have that service because it was so useful on the iPad. Their product Dragon Anywhere is, in my opinion, the best dictation solution on the iPhone and iPad. Nuance says they are still supporting those platforms. Over on the iPad and iPhone, the story gets even weirder. But at least for now, you still have working software. If I had to bet a nickel, I would bet installation of macOS Catalina as the day that Dragon dies on my Mac. I have no idea how long that will continue. If you already bought Dragon for Mac, you will find that it still works.
Nuance has always been the leader in voice-to-speech dictation, and I have been a customer of theirs for years on both the Windows PC and Mac platforms. If this is news to you, Nuance, the makers of Dragon Professional Individual for Mac, speech-to-text software, announced back in October that they would no longer support the Mac. A lot of folks have been asking me what I'm doing about voice-to-text dictation now that Nuance has officially pulled out of the Mac and appears to have relatively abandoned iOS.