Yes, the burden of proof HAS shifted;
So now you want people to prove that your personal afterlife doesn't exist?
No, I want you to behave rationally and evaluate evidence like a scientist.
I want you to evaluate the evidence, and then propose an explanation for it.
The evidence is generally thought to be so overwhelming
that an explanation not involving the survival hypothesis
(the idea that some personalities survive death, some of the time)
is not plausible in the least.