'Cosmic radio' detector could discover dark matter within 15 years

how long would it go without finding dark matter before physicists would get worried?

They'll just do what they've done for the past twenty years.

Adjust the theory to make it darker, lighter and more nebulous.

The end station of dark matter is that "we know it's real because computer models but due to a fluke there's no dark matter in the solar system so we can't detect it".

I can't agree with this. No scientist says, "we know it's real because computer models but due to a fluke there's no dark matter in the solar system so we can't detect it." No scientist says, "we know it's real..." about anything. What scientists say is something like, "so far this theory has not been ruled out by evidence." So far, the theory of Dark Matter has not yet been ruled out by numerous attempts to do so along multiple independents lines of observational evidence:

- galaxy rotation curves

- galaxy cluster dynamics

- gravitational lensing

- the Cosmic Microwave Background radiation

- large-scale structure

- Baryon Acoustic Oscillations

- X-ray emission in galaxy clusters

- galaxy cluster collisions

- mass-to-light ratios

That's a tall order for any competing theories. They're welcome to try, of course, but so far none have succeeded.

I guess you're not a scientist by your own admission because your entire post is just a big

"Ackshually, we know dark matter is real because computer models"

Though to be honest that's unfair to computer models as dark matter cannot be consistently modeled in a way that lines up with the observable universe.

So your philosophy is more accurately described as

"ackshually we know dark matter is real because it's a fundamental pillar of the scientism dogma, have faith in the cold dark matter that we will never be able to detect"

If we replace "dark matter" with "the will of god" as a mysterious force with arbitrary value and direction, we end up with the very same theory with only a changed name.

That anyone takes it seriously at all does as much good for cosmology as a field as Trump does good for politics.