I think what ipos was saying was that the need for jb for most people is obsolete.
This may be true for him and it may be true for a majority of others, but it is not true for me.
I have stated several times here in the past that once Apple allows me to fully customize my device in the same way I have it now is when I will stop jailbreaking.
But there's more to that to me as well. Every time Apple takes a jailbreak tweak and incorporates it they do a horrible job of it.
Can you really compare the stock Quick Reply to BiteSMS? Night Mode to f.lux? Call blocking to iBlacklist?
Does the standard Alarm app have DisAlarm? What about Activator functions? Can I completely silence everything including alarms stock with one action if my phone is stock?
How about labels in the Mail app? Mail Labeler lets me have colored labels and I can easily see what account the email belongs to.
Can I make calls from the lockscreen stock? No, I need Callbar for that. How about photo albums? Apple doesn't do what Photoalbums plus does?
I can go on. But my point is
I use all this stuff! So for me, jailbreak will never be dead until Apple allows me to do all this (and more).
For the average person this is irrelevant. They're ok with stock. But I'm not.