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?
Now I'm still working with MEW's Myetherwallet wallet. I personally believe that it remains the safest and most convenient option for users. Especially convenient and fast wallet when working with tokens based on ERC20.