Looking at the TVL/Volume of the main privacy protocols on Ethereum right now: Tornado Cash accounts for over 80% of the TVL, holding an absolute advantage; Railgun comes in second with just over 15%. For 30-day volume, Tornado Cash takes up 70%, still far ahead, but Railgun also exceeds 25%. It seems that while Railgun's TVL share isn't high, its volume share is quite decent.