All religion goes through three stages of existence.
The first stage is in forming before they gain political power and are a cult.
The second stage is when political power is achieved and they become a religion.
The third and final stage is when they are dead and become a mythology...
Religions that are alive today will be tomorrow's mythologies...
the current ones seem to have legs but there are cracks appearing
They have been dying for centuries and are in their death throes. It takes time for accumulated power to fade....