Read his post.
I believe he did. He just said that Bitcoin has indeed changed a lot of times in the past, to improve the way it works. You see, sometimes, the “singers” of this network
must switch tunes, but that's not necessarily bad. As long as there is
harmony, we're fine.
Bitcoin didn’t actually “change”, like what the poster’s context of “change”.
He believes a change in Bitcoin’s POW “or some better model” <- not sure what that means
I guess he said that PoW will either be changed or a new mechanism will replace it, although I doubt for both of them.
Change the POW algorithm, the network breaks down. Everything about it breaks down, it’s laughable to consider thinking about that “change”.
Is he actually saying that Bitcoin must break what makes the whole system work?
“Break” isn't the greatest word to describe this. The system has to change
sooner or later and you should be okay with this, except if you haven't understood the way it is structured.
I'm quoting you a message of this forum:
According to NIST and ECRYPT II, the cryptographic algorithms used in Bitcoin are expected to be strong until at least 2030. (After that, it will not be too difficult to transition to different algorithms.)
But a change of the POW? That will break the incentive structure, the game theory, that thing that makes everything behind Bitcoin work.