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?
The truth is I still using New even today because for me it is the best electronic wallet.. and I really trust it because if I will going to choose another electronic wallet I don't think it is safe... It's very hard to make a decision where you will all keep your coins especially now that lots of scammers are everywhere we need to become aware about it...