Within the video's story, they removed virtual memory and memory protection because the JIT was good enough. Nothing like that has happened at all.
Sometimes I think, I wish I had the knowledge to dig into these kinds of detailed parts like you do. I tend to obsess only over the context of what the video is trying to say, so I miss these small details. You probably achieved that through hard study. I looked it up, and you were definitely right
The WebAssembly component people are pushing Wasm as a replacement for container-based virtualization, so it's not that far off.