>At what point do Q drops no longer have any relevance?
>How long can it go an and still be valid?
depends on what you mean by relevance/validity.
If "validity" means always being completely accurate and literally true, Q drops have never been presented that way.
Q told us many times.
They are more like a POINTER –
with clues designed to help us figure out what matters most.
By the way, why do you ask?