I suggested it is past its use-by date on the basis that the situation or context that informed the vote changed soon after, ie the validity of the vote become overtaken by events. You could argue that those events were either the unexpected intractability of the EU or the incompetence, ignorance and duplicity of Parliament, which has exceeded even the worst expectations.
Do you not remember Project Fear? People heard all that guff from Osborne and still voted Leave.
No deal with EU was on the table then, and it still isn't now - same same. Hence, time to Leave as the people asked for.