Codechef as a platform for competitive programming is becoming more a platform for people to cheat and plagiarise codes during long challenges and then boast off their ratings as a reflection of their hard-work.
Also, many self reliant competitive programmers would not consider your cc ratings as a reflection of your knowledge, rather they would go for codeforces.
I think admin knows whats been happening lately over a few months we have seen creation of multiple telegram and whatsapp groups for discussion of long challenge problems.
I think to overcome this , Codechef should either increase the difficulty of problems in long challenge from 3-4 problem in Div2 atleast, to still keep the competition relevant.
Also if multiple short contests like codeforces is conducted, we would learn a lot and be interested in giving contests on Codechef.
Today I think Codechef is irrelevant.