Yeah but simplistically saying EFIS will save you is misleading. There's a few options and some are great, some not so great, depends what is fitted. More important than EFIS if in IMC inadvertently at a safe altitude would be an autopilot of some sort. At low alt sudden IMC around the trees and hills takes quick thinking and a lot of luck to survive, the emphasis on luck, as its been proven the best equipment will still hit the ground hard if you try.