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?
I still use myetherwallet. It is more convenient for me to use than any other wallet. I am only concerned with the way most people have experienced hacking repeatedly. But I still prefer MEW.