Well, we'll see what they have to say.
But I wouldn't get my hopes up. "There are no changes to our current pricing model planned _at this time_" is already a very telling part of Serif's previous statement.
While they have earned a measure of trust, the problem is that they aren't the ones you need to trust anymore - if Canva wants to turn Affinity into a collection of bloodsucking subscription apps, then that's what's going to happen, short of a legally binding guarantee to the contrary.