Thanks to everyone in this thread, great topic.
As Zach may remember from my email... I would LOVE to see an official recommendation if and when one may arise. Used carefully, smooth scrolling can make the already super smooth animations even slicker, https://katiforner.com/ is a great example of that.
That said... kohlej's animations built on Blakes awesome example seems to work perfectly, what else would need to be solved for it to be used in production?
Best, David