The A7 III will soon get the A6400's improved AF which is truly amazing (firmware update due shortly): https://www.cinema5d.com/sony-a6400-review-is-the-end-of-manual-focus-lenses-near/
For those that know how to deal with Sony color (yeah, it's more work but workable for video (prefer Canon for stills)), an A7 III with this level AF (and the A7S III will likely be excellent- 10 bit?) will be very compelling vs. the cheaper X-T3 and more expensive EOS R for video.
For those that know how to deal with Sony color (yeah, it's more work but workable for video (prefer Canon for stills)), an A7 III with this level AF (and the A7S III will likely be excellent- 10 bit?) will be very compelling vs. the cheaper X-T3 and more expensive EOS R for video.