I take your meaning.
Hmm...
The blog post, which I did not need a translator for, does not state this one detail.
But I agree with your interpretation.
Seager does say, in your link, that the Immutable Snaps Only Ubuntu will become default with regular Ubuntu coexisting.
And...:
It is a way of quietly abandoning it.
This is a very poor choice of direction; based on obtaining the utmost control over the end user.
Well, I stand corrected on this - There is discrepancy here, but enough discrepancy to allow Canonical an "out".