I don't know if there is a term for this "simplified feature obscures (knowledge of) the complete set of features" situation. What I do know is that Adobe made an attempt to apply something called progressive disclosure. This is the practice of providing a simplified UI for less complex tasks and make advanced options less obtrusive. It prevents ...
I think the most common term is "Dark Mode", you can play with Google Trends to find a better wording. Using words like contrast and readability carry other meanings especially since dark mode doesn't necessarily lead to better readability, it depends on the user's disability.
Design for the Perpetual Intermediates
While everyone is a novice at some point, few remain at that level for very long. Every interaction with any site or piece of technology adds to their mental models and they quickly move up in experience. Even if you are designing an interface for a first-time user, it's likely you assume they know what a screen and ...
First, to define the opposite term:
adjective, sav·vi·er, sav·vi·est.
1. experienced, knowledgable, and well-informed; shrewd (often used in combination):
consumers who are savvy about prices;
a tech-savvy entrepreneur.
2. Also sav·vi·ness. practical understanding; shrewdness or intelligence; common sense:
a candidate who seemed to have no ...
KISS does indeed mean "Keep it simple, stupid", but the stupid in question is not the user - it's the designer. This is a self-humbling mantra reminding you to avoid going too deep down the rabbit hole.
Although I think the assumption that our users are "stupid" is wrong to begin with, I think you're looking for terms like "...