I recall some conversations a decade ago about the future of LCDM theory, and upcoming 'dark matter' laboratory experimentation. CDM was really the only one of the four metaphysical claims of LCDM theory that could be tested here in labs on Earth. The "expanding space" claim, along with it's buddies inflation and "space acceleration", aren't even concepts that can be tested here on Earth, leaving CDM in the crosshairs of mainstream "tests" in the lab.
There was a lot of optimism in mainstream circles back in 2006, and for good reason. LHC was about to come online, and the search for WIMP and/or axion forms of invisible matter presumably could be tested in labs on Earth, and several proposed experiments were starting to get funded. There were "high hopes" in 2006 that the CDM side of LCDM theory would be verified, either at LHC, or in one of the other WIMP or axion lab experiments.
The 2006 galaxy cluster collision paper did seem to favor a "missing mass" explanation rather than a MOND solution to galaxy rotation patterns. Unfortunately in that landmark paper, that "missing mass" concept was turned into the term "dark matter" and it was then associated with all sorts of "properties" that the lensing data alone could not provide. The entire claim about how much baryonic mass was present in those clusters was highly dependent upon the accuracy of their "guestimations", methods and assumptions.
The past decade however has really been exceptionally unkind to LCDM theory. It was discovered in the last decade that the homogeneity of the microwave background signal does not extend to the largest scales as inflation theory "predicted". It has also been discovered that SN!A events come in *at least* two different flavors, not one as "dark energy" claims were originally based upon. These two bombshells however are almost "minor" problems compared to their problem with exotic matter claims, particuarly after the revelations of the past decade from LHC, LUX, PandaX, electron roundness tests, etc.
Every single popular "prediction" that was related to exotic forms of SUSY matter, or axions, or sterile neutrinos has gone spectacularly up in flames here on Earth. Not one SUSY "sparticle" has been observed, and not one significant variation from the standard pariticle physics model has been observed, even after *billions* of dollars worth of experimentation, and the completion of the standard particle physics model with the discovery of the Higgs.
Every other WIMP and axion experiment has come up empty too, not just LHC. It's been an *exceptionally* tough decade on exotic matter CDM proponents.
Most damning however, we've since learned that the mainstream was underestimating the stellar counts by between 3 and 20 times depending on the size of the star and the type of the galaxy, *and* they hadn't a clue where they might find the 'missing baryons" in 2006. Those "missing baryons" were found in 2012, and they were found *exactly* where their 'dark matter' models predicted them to be.
In short, there's absolutely no exotic matter necessary to explain those 2006 lensing studies, and all the lab results to date utterly disfavor the existence of exotic forms of matter.
The problem with the current LCDM paradigm in terms of coming to terms with all their problems with baryonic mass calculation errors in that 2006 paper are related to their big bang nucleosynthesis claims. If they try to simply replace exotic matter with ordinary baryons, those hydrogen/helium necleosynthesis numbers go flying out the window, and their theory doesn't work right anymore. They really are between a rock and a hard place in terms of coming to grips with their horrific baryonic mass estimates. Even the oversimplications of their model work against them in terms of even comprehending their own error. We do observe galaxies in micorwave and x-ray that are not visible in ordinary white light because of the elemental composition of the plasma between us and that galaxy as it selectively absorbs various wavelengths. In their overly-simplistic snow globe universe, the plasma content between us and any object is not even even considered in their calculations of baryonic mass!
Sooner or later the mainstream will have to embrace the realities of empirical physics, which can and does fully explain all of the lensing data, and all of the galaxy rotation curve data to date.
They seem so intent on hanging onto a supernatural creation mythology that they simply cannot and will not accept the bitersweet findings of the past decade with respect to their various claims, particularly their exotic matter claim. They've "tested" their claims, and every single one of them has been falsified by later data.
While LCDM theory might have made some sense in 2006, it looks tattered, torn and shredded to pieces in 2016, simply based on the outcome of the mainstream's own "tests" and their own lab experiments.
What's it going to take to kill that metaphysical beast in the minds of it's proponents anyway?