Sony today announced several updates for Sony Alpha A9, A7II, A7 III, A7rII, A7rIII, A7sII and A6500

All firmware updates just bring a vague improvements of the “overall stability of the camera”

Sony A7III (download here).
Sony A7sII (download here).
Sony A6500 (download here ).
Sony A9 (download here).
Sony A7rIII (download here).
Sony A7rII (download here).
Sony A7II (download here).