if chrome ever ends up with a majority browser share on ios/ipados, apple won't have any way to keep up. at this point, google already almost 100% controls web standards, and they can push new features (no matter how privacy-hostile or overreaching) without even allowing apple the chance to keep up. at that point, the incentives for apple to keep developing safari would slowly dwindle away.

(oh, and gecko is a joke, especially on mobile - no need to even bring it up)