You are still missing some of the finer points of the controversy. The JS issue is more complicated than "just let $browser engine in". One complicating factor

You are still missing some of the finer points of the controversy. The JS issue is more complicated than "just let $browser engine in". One complicating factor is JIT Javascript compilation. My understanding is that Apple applies DEP to unblessed applications on iOS, which precludes apps not so blessed from employing JIT compilation/optimization. And, predictably, only Apple apps are blessed. So, yes, sometimes things Apple does, it does to suppress competition. Some things it does, it does for security. (There are many other reasons for what it does.) I know this isn't going to change any minds. But claiming Apple is pulling a Microsoft with Safari for competitive reasons, I believe, is rather missing the point. I mean, I suppose you could say Apple wanted a reason to keep other engines off iOS and so came up with DEP as an excuse, but imputing motives that way isn't a terribly great way to go through life. And… if you don't like the walled garden, just jailbreak your phone. It isn't that hard. Of course, then you're on your own, but that's what you say to want.