The relativistic physics is an unfinished one. So far, we have only relativistic mechanics for single particle and relativistic field theory but with the divergence problem; we do not have an acceptable relativistic statistical mechanics and thermodynamics for many-particle systems. Nevertheless, it has turned out that relativistic statistical mechanics and thermodynamics for many-particle systems can not be formed in the framework of special relativity due to the conflicts in concepts.

We need to step forward from special relativity. The modified special relativity will keep the existing relativistic mechanics for single particle and allow to develop a relativistic field theory without the divergence problem and to form a relativistic statistical mechanics and thermodynamics for many-particle systems.

My relativity is not too great. But if we form a unification theory between relativity and quantum mechanics and then adapt quantum statistical mechanics, surely that will tell us much more physics that devising a separate relativistic statistical mechanics?

there already is a unification between SR and QM