Its about time. The Youtube UI has become a disaster over the last few years. It all started with the ability to let uploaders "annotate" their videos. I've disabled the setting to show annotations probably a dozen times and they keep coming back. I can't figure out if the setting is poorly implemented or if youtube is deliberately switching the setting back.
But they aren't replacing the legitimate need. Some videos do benefit from background material. Or a patreon type link to support the content creator.
Google should address the need. Otherwise it just looks like a tactic to keep people on YouTube.