The phrase "become futile" is correct and usable in written English.
You can use it when describing a situation in which an action or effort has reached a point of no return, and the outcome is deemed pointless. For example: "The search for survivors became futile after the plane crash."
Mr. Goldstein told me to relax because trying to keep up with every application has become futile.
Inland housing markets that were booming a few years ago are now so awash with foreclosed homes that building has become futile.
There is no malaria vaccine, and using one drug after another to ward off malaria has become futile as the parasites evolve into resistant strains.
The World Bank is saying that our aspirations to put an end to global poverty in the context of runaway climate change will become futile.
The second holdout lasted for forty-five days, but the Democrats' unanimity cracked when Senator John Whitmire, of Houston, decided that the effort had become futile, and returned to Texas for the Labor Day weekend.
I used to feel a bit nervous about my twenties coming to an end, but now I can't wait: the race to have the most friends will finally become futile.
Argument turns to whine and becomes futile in the face of madness.
'When you see them trying to make it more and more extreme - the grabbing of the head, the multiple facial cum shots - it becomes futile.
But as helicopter traffic has more than doubled at East Hampton Airport during the past decade, trying to hear "the subtle sounds of a hummingbird" became futile, he said, especially on Friday and Sunday afternoons and evenings and Monday mornings.
If, for example, Marco Rubio fails again to pick up a single delegate (and polling suggests that's a real possibility), his pursuit of the 1,237 delegates needed to win the Republican nomination becomes futile – even if he were to win every single remaining delegate after 15 March.
Accordingly, the classical nonlinear mixed-effects modeling approach becomes futile under this scenario.
