Salafis vigorously propagate that there are only 8 raka'ts Taraaweeh.

Answer

Twenty raka'ts Taraaweeh Salaat are Sunnatul Muaqqadah. It is a major sin to abandon or neglect this very important Salaat in the manner in which all the Sahaabah had performed it. Twenty raka'ts were the Taraaweeh practice since the time of the Sahaabah. It is total ignorance to argue about the number of Taraaweeh raka'ts fourteen centuries after the Sahaabah. The implication is that even the Sahaabah did not understand the Islam which they had acquired from Rasulullah (sallallahu alayhi wasallam). Salafi deviates proclaim 8 raka'ts only. But their claim is baseless, and may not be presented in negation of the practice of the Sahaabah and the Ummah.