It might not be quite correct to describe it as the final nail in the coffin, but it absolutely was the killing blow. Flash had been on shaky grounds for years

It might not be quite correct to describe it as the final nail in the coffin, but it absolutely was the killing blow. Flash had been on shaky grounds for years. It was obvious that it had a limited lifespan, and that it eventually needed to die. I think even Adobe recognised this. But Apple accelerated it's death massively, and everyone seems to be very thankful for that.