The phrase "at the expense of the new" is correct and usable in written English.
It can be used to indicate that something is being prioritized or achieved while sacrificing or neglecting something new or different.
Example: "The company decided to invest heavily in its existing products at the expense of the new innovations that could have transformed the market."
Alternatives: "at the cost of the new" or "to the detriment of the new".
Was anyone harmed at the expense of the new information?
You know, folks, we've had some fun in recent months at the expense of the new James Bond movie, "Skyfall".
If he ever became China's top leader, the professor had predicted, "he would likely aggressively attempt to address these evils, perhaps at the expense of the new moneyed class".
NASA needs to get to flight tests for the X-33 to prove the technology and show faith in its investment, but not at the expense of the new initiative".
The problems are exacerbated by an investment mentality that favors the old (gas and oil) at the expense of the new (emerging tech).
This dramatically limits the virality of the social networks on Flux and ensures the continued success of YouTube and Brightcove at the expense of the new network.
The Toronto Raptors won their fourth straight at the expense of the New York Knicks, 92-88.
Chan, who was 6 when her family moved to Manhattan from the Bronx, has been around to celebrate all of the Yankees' 26 World Series championships, including the first in 1923, which came at the expense of the New York Giants.
After Monday night's first game against the Mets, the Giants' broadcast team (best in baseball: Jon Miller, Duane Kuiper, Mike Krukow et al) were having some fun at the expense of the New York press, mostly concerning the inattention of the reporters to anything except Barry Bonds.
The Civil War of 1861-65 sthengthened the federal government at the expense of the states; the New Deal strengthened the presidency at the expense of the judiciary and Congress Watergatee weakened the presidency again.
When Mr. Ferriss signed with Amazon, he celebrated the new at the expense of the old.
