There are a lot of great points in the video and i think the community will make it work.

There is no doubt that Gutenberg will be a success, but as i see it it won't be because of the Gutenberg team, it will be in spite of the gutenberg team.
I dont think many would argue that the project hasn't been grossly mishandled most of the way, the large public outcry is clear evidence of that. But hopefully that will prevent this type of project strategy in the future.

That being said, i still dont think it is too late to make Gutenberg opt-in for at least 6 months or a year. Ask during new installations whether the user wants classic "MS Word" style editing or modern Gutenberg style editing.