Snoke is "a couple hundred years old"

According to Andy Serkis

I guess that kills the Palpatine servant theory.

Even if we accept this as true, how? Why couldn’t Snoke become one of Palp’s servants even if he was hundreds of years old.

It solves the mystery then, Ezra gets transported back in time.

“When gone I am, the last of the Jedi you will be.”

Sauce?