[Vuejs]-Can be Vue.observable be used as Vuex replacement?

It is just a shorthand for old: new Vue({data() { return {...}; } }).

If you need data which is shared between components you had to create new Vue(...). Now you can use observable – Vue.observable({...}) and use it in render-functions or computeds.

So, I think it is not Vuex replacement, because Vuex cares about global App data and has nice debug tools.