The phrasing strongly implies that they are taking the migration seriously and carefully. Merging straight to canary after 9 days is insane.

I have a friend who get super mad when he fails ">80% chance of success" throws.

This isn't case of this tho. Even he said that there is a high chance of RIIR, 9 days still insanely short time for such rewrite if you're planning to have some sort of community around the project.

We all have eyes, it doesn't take a genius to spot a lie.