2nd test demonstrated that if it was launched at minimum energy trajectory then it would have reached beyond circular velocity thus viable in SLV role if repurposed/adapted for such.
Your assertion is only possible by someone uneducated on the subject.
You don't know anything on AAMs of PRC and DPRK yet make such assertion that is factually incorrect.
You're uneducated arrogant ignorant illiterate.
North Korea is developing and testing Global Hawk size UAV.
North Korea and Iran have joint research and development of military technology.
In my opinion Russia and China only "lag" behind because they favor what is cost effective and reliable with China in recent times going for AESA.
Seeing how conflict between them and America could turn active in next decade or so at this point, Russia has focus on everywhere but aviation.
Issue is balancing of components to avoid imbalance that can destroy engine.
Also lighter components would result in higher temperatures.
Which materials may not handle increased heating.
Thing is new jet engine design is more viable.