I am not beating the dead horse, i just said it is a possibility that can be changed and that does not mean that the developers are going to change that. I just said it is possible to change the limit and it is a real possibility if there is a consensus that the maximum cap can be changed it is possible to change the cap we have right now. It all depends upon the general consensus and nothing is written in stone as we have seen many changes in the short period of bitcoin
That would herald the end of Bitcoin as we know it
So, in a way, it could be claimed that changing things which make Bitcoin Bitcoin (like the 21M hard cap) are not a real possibility for Bitcoin. Other than that, we don't actually need to change Bitcoin's major specs as we could easily hard fork it and call the spin-off Advanced Bitcoin, or whatever, with, for example, a more advanced hard cap. If you are going to claim that it won't be a genuine Bitcoin, one and only, then the same reasoning is equally applicable to changing the fundamental specs of a genuine Bitcoin, a Bitcoin that we are all familiar with