> the object construction can be done with static methods

I've done that a lot too, but I found that free functions are much better for this than static member functions, because you can't get CTAD from static member functions. For example, with constructors we could write:

  vector{1, 2, 3}; // deduces vector<int>

And with a static member, we would need:

  vector<int>::init(1, 2, 3);

With a free function, we could write:

  make_vector(1, 2, 3); // returns vector<int>