It is a mandatory step in the development of the network and prosperity of bitcoin. So yes it won't be cancelled.
The title is misleading and since it suggest a eventual cancellation which is not true. A better title would be. Should the halving be cancelled?
That's what I think should happen and assume will happen ("unless miners want to kill bitcoin"). My logic is flawless, lol. If the halving is so beneficial for the "prosperity of bitcoin", why not cancel the miners reward altogether?
Fly me to the moon
because satoshi wanted that the reward was spread in a long time to permit adoption to take off, and to permit the efficiency to catch the reward itself
Okay, Bitcoin took off (at least, that's what they all say), so its time to cancel the halving? Or did it?
If it didn't make it, what is the metric we should look at?
The fee. Bitcoin took off but only slightly. The current status surely is not the target already. When adoption is so high that the fees are high enough to reward miners and at least make the network secure a couple of times then we would not need block rewards beside fee anymore. But we have a long way to go till that.