The de Wilde Emma was the last movie I saw in a theater before lockdown! though I don't think I've seen any of the other three adaptations you discussed here. I agree Johnny Flynn was too far on the young side for Mr. Knightley. I wasn't entirely convinced by their Harriet, I thought she was styled to look a little too plain, though looking at other pictures of Mia Goth it appears that she's capable of quite some glamour in other looks. I liked that the movie gave some screen time to the servants rolling their eyes at the ridiculousness of the main characters. But I didn't like Mr. Woodhouse being made quite such a caricature. It felt like they were showing him as being purely capricious, instead of showing the genuine underlying concern. And I was also thrown by a slight deviation from the book plot near the end which felt like unnecessary modern moralizing, after a relatively faithful rendering up till then. But the visual were gorgeous, in any case.