[alexthehurst]

But aren’t toasts fundamentally different by being intentionally designed not to block your work?

[wtallis]

Pop-up ads from the dark ages of the web largely weren't modal dialog boxes. For the most part, clicking to dismiss them, or clicking to bring the window you cared about back to the foreground was at least as easy as getting rid of "toast" style pop-ups. Both are intentionally distracting, neither is blocking in the sense of preventing you from continuing to interact with the window they partially obscure.