I have to disagree: Apple certainly could block content in a selective way that avoids breaking apps (not that Apple is particularly averse to breaking existing

I have to disagree: Apple certainly could block content in a selective way that avoids breaking apps (not that Apple is particularly averse to breaking existing apps). Beyond that, the browser engine may be an irrelevant implementation detail to the end user, but at the ecosystem-level, iOS's Safari lock-in has many harmful effects that are already well known and widely discussed.