Should all users be able to switch on-the-fly between simple-mode and an advanced-mode to be able to be able to temporarly expose more advanced settings and functions in the UI only when needed?
Example of software that does something similar is Kodi (formerly XBMC), it allows users to switch settings levels on-the-fly to hide or show more advanced options inside its GUI. For this purpose Kodi has 4 tiered settings levels where each level unlocks more advanced settings; those settings levels available in its GUI are: “Basic”, “Standard (Default)”, “Advanced”, and “Expert”.
Inside Kodi’s GUI, the “Settings level” can be changed using a button-icon in the bottom left on the GUI under the settings section, clicking that button in the GUI shows the currently selected setting level and allow the user to change setting levels on-the-fly, and it just as easy to change back. More info on that user-experience in their wiki => https://kodi.wiki/view/Settings
The purpose of this option inside the GUI is that a normal users can have the settings level set as “Standard” 99% of the time so that they don’t have to be exposed everyday to more advanced settings that not used most of the time, but they still always have the option via GUI to simply change the settings level to advanced or expert in order to expose and change settings classed as such if for example given advice in the cummunity forum to change an advanced setting for a specific thing and then be able to quickly change back the settings level in order to hide those more advanced settings again.