The twists and turns my career has taken had me pretty much skip the whole front-end JavaScript framework wars so it's nice to see "plain old HTML" make an enhanced comeback.
This is a regression on graceful degradation.
It takes careful but not extraordinate thinking to think of ways to get consistent results with or without JavaScript turned on. Indeed, when a visitor hits a site for the first time they get the full response so everything for a graceful degradation should already be there to use. If I can figure it out, I'm sure big CS brains can.