Why would we possibly care about jailbreakme.com, or think that any security issue involving an intentionally-jailbroken phone would in any way reflect on Apple?

Except JBM was based on exploits in the official firmware, that the jailbreak would fix.

Are you seriously bringing up stuff that was patched in iOS 1.1.2? Dude. It's 2015.

4.3.4.

Also, it's really quite clear that the iPhone and iOS devices in general are, in fact, THE replacement for computers for hundreds of millions of users. So I don't think we really need to waste time debating that. Apple won. Apple succeeded in making a device which is useful for that purpose.

According to IDC[1] their market share is ~14%. I'd hardly call that winning.

1: http://www.idc.com/prodserv/smartphone-os-market-share.jsp