"I wonder if there are sites..." Imagine a future where common sense prevailed. "Sorry, your browser is too complicated. Be smart and downgrade to something

"I wonder if there are sites..." Imagine a future where common sense prevailed. "Sorry, your browser is too complicated. Be smart and downgrade to something more secure." (Replace "secure" with whatever word of improvement you like. Faster, smaller, fewer dependencies, etc.) The "modern browser" serves many stakeholders, the least of which is the user.