I have a question

Why should we use env to store important data instead of json

As far as I know json can do it, evn can also do it, and evn can do it with json . Or when is it better to use json and when is it better to use evn, because I think the functions of the two are almost the same. (I’m not sure if this is the case)

I have read a lot of information, but there is no answer that I am satisfied with

I don’t know if this question is very simple, I hope you can answer it, thank you