Why these labels show up in search
People often land on assertive and turbulent right after seeing a type result like ENFP-A or INTJ-T. That creates a practical search need: they want to know whether the extra letter changes the core type or simply adds nuance.
The shortest useful answer is that the four-letter MBTI-style code still carries the main personality pattern. Assertive and turbulent are usually presented as a confidence- and stress-style overlay rather than a replacement for the type itself.