TThe improved ergonomics is even more visible with *ngSwitch:

The new control flow enables significantly better type-narrowing in the individual branches in @switch, which is impossible in *ngSwitch.

Before Angular 17,

Which with the built-in control flow turns into:

From Angular 17,

@switch (accessLevel) {

  @case ('admin') { }

  @case ('moderator') { }

  @default { }

}