[em500]

I'm guessing that historically toggle switches would (immediately) close some electric circuit, whereas checkboxes were used to mark things as done on some paper list.

[hgsgm]

Checkboxes were used to indicate a request in a <form> that you later <submit>

[lgreiv]

Exactly this is it.

[reacweb]

Maybe we should use toggle switch only when the effect is immediately visible.

[_dain_]

Great observation.