I don’t see any cons to using strict mode with this vuex. The performances seem better and it is easier to debug. So, why disable that mode?
>Solution :
Strict mode should not be used in production. Strict mode runs a synchronous deep watcher on the state tree for detecting inappropriate mutations, and this can slow down the application. To avoid changing strict to false each time you want to create a production bundle, you should use a build tool that makes the strict value false when creating the production bundle
you can enable that mode with this:
const store = new Vuex.Store({ // ... strict: true});