It isn't quite as bad as when the codebase was switched to Symfony, but the Drupal project has just kind of abandoned it's core presentation system in favor of the new Canvas tool, and compatibility with the rest of the core seems like an afterthought. So now you have at least 3 competing display configuration solutions, which don't necessarily work together, or entirely work alone.

It's a situation entirely inline with Drupal's reputation: they couldn't just get it right, and now serious Drupal teams don't know which way to go in the ecosystem.