From various sources, MyEtherWallet (MEW) are not under development and maintenance any more. Even its founders has confirmed that they are switching to develop a new platform called mycrypto and encourage everybody to move there property to there.
But IMO, MEW or mycrypto is just a gateway to access your real wallet in the blockchain, so, both of them are still fine event MEW is not maintained anymore, right?
In my work MyEtherWallet becomes the only way to work comfortably. Offers a fairly quick and convenient transaction execution with the full set of features and features that I may need. So far, my work with MEW is wonderful, without threats to keep its assets safe.