I think this depends on what is meant by "mass-die off". I still think a scenario where 50% of the vaccinated are dead 10 years from now remains uncomfortably likely; and that a scenario where over 95% of them are dead in 10 years still remains in the realm of possibility.

It would be a major die off, with massive implications; but it might not involve anything we'd recognize as a "mass die off", especially if, as seems likely to me, the number of people vaccinated is really much lower than the official numbers.