The phrase "are leaving mainstream" is correct and usable in written English.
It can be used to describe a departure from conventional or widely accepted ideas, practices, or trends.
Example: "As more artists explore unique styles, they are leaving mainstream music behind in search of more authentic expressions."
Alternatives: "departing from mainstream" or "moving away from mainstream".
Russell Hamblin-Boone of the CFA also claimed that payday lenders are leaving mainstream lenders behind in the way they "pioneering technology".
But new corporate-governance rules are shifting that balance, making companies more vulnerable to contests for board seats, while mediocre stock returns are leaving mainstream mutual-fund investors dissatisfied".
He says: "Young people are leaving mainstream parties and joining smaller groups – they think they are more evolved, more active, that people listen to them, and that they can actually change things".
These are the white people who listen to public radio and shop at food co-ops and think they're leaving the mainstream but they're not.
"Hope Inside" has been working with more and more banks each year to provide financial literacy training and access to bank accounts to people who are left outside the mainstream banking system.
The event will explore the quickly expanding world of citizen journalism: how technology is fueling its growth; how that growth is changing the way we see our world, enact change, and disseminate the news; and how people in communities around the world are taking the initiative to share stories that are left untold by the mainstream media.
"I think most people in the mainstream media are left of center and, therefore, they want a very left-of-center president versus a conservative president like Mitt Romney".
"I think most people in the mainstream media are left of center, and therefore they want a very left-of-center president than they want a conservative president like Mitt Romney," Mr. Ryan said.
In response to a question from Chris Wallace on Fox News Sunday, Mr. Ryan, Mr. Romney's running mate, touched on a subject that has been high on the list of talking points among conservatives lately, asserting that "most people in the mainstream media are left of center and therefore, they want a very left of center president more than they want a conservative president like Mitt Romney".
The haze of unpredictability in the 2016 election is symptomatic of that revulsion where the mainstream politicians are left at the altar as the left and right extremes run away with the bride, shocking the flower girls and political pundits alike.
With no hard data about whether adding Zetia to Zocor prevents heart attacks or strokes, doctors and patients are left balancing two scientific arguments: the mainstream idea that cholesterol drugs work just by lowering cholesterol; and the case made by a handful of rebels who say that their benefit is more complex.
