Please re-read your own comment. You describe two hard things, performance and long-tail compatibility, and literally state that “the team” will have a nightmare left after an initial cruise.
Having a better team just means they can manage "the hard part/nightmare" better, doesn't change where the hard part is.
And I mention these two things because the article itself said they're going to "[f]ocus on vertical slices" first and "[d]eferring on performance work". So I was pointing out that it basically means they started with easy part (nothing wrong with it).
I still failed to see what point I said you didn't agree with, other than argumentum ad verecundiam.
