GP is talking about the component/feature present in React/Vue/Angular/etc routers that allows links to behave like normal anchor links (allowing to open in another window, etc) but also use the SPA router for navigation when possible.

I'm not making any argument here, just explaining. Also makeitdouble's idea would apply even to non-SPAs or to pages without javascript. For example, I might want to submit a form but in a new tab.