I heard that the wallet MEW may not be used anymore, this information is true. So if the wallet MEW for some reason can not be used then can we use any other wallet?
No, MEW will continue be live. You, maybe mean, that MEW devs splited into two teams with their own product - one continue MEW developing and other started new web wallet MyCrypto
https://mycrypto.com with "Captain Everything Officer" Taylor team lead (one of the MyEtherwallet founder).