They do because signal-based components will be refreshed only when their Signals change. The structure of the DOM tree won't matter anymore, which means the direction fo the data-flow has no importance. See here: https://github.com/angular/angular/discussions/49684#:~:text=This%20is%20the%20golden%20rule%20of%20signal%20components%3A%20change%20detection%20for%20a%20component%20will%20be%20scheduled%20when%20and%20only%20when%20a%20signal%20read%20in%20the%20template%20notifies%20Angular%20that%20it%20has%20changed.