Pages may be questionable as to whether or not they’re Wiki Author Tips or music app tutorial material.
The GUI_design page would seems to have relevance for both on the broader level.
GUI topics like the App Store emoticon link page seem more clearly appropriate for the wiki section.
Topics like markdown and apps like Textastic seem very removed from music creation so tutorial on them should focus on very specific musical applications.
Audiobus forum wiki can’t become a mini version of Wikipedia.