Honest question here. Could it be possibly that as they improved their DRM with more triggers and methods that it has started to impact performance since 2016?
As Empress was cracking Denuvo, I wouldnt be surprised if they started to quickly add extra defencive measures compromising what could have been optimised in the past.
YouTube Vanced was shut down because they tried to monetise it by releasing their own crypto NFTs, sparking Google to shut it down. I think for now Revanced is safe.