Modified gravity/Dynamical Dark Energy vs $\Lambda$CDM: is the game over?

Understand

Over the last decades, tests on the standard model of cosmology, the so-called $\Lambda$CDM model, have been widely analysed and compared with many different models for describing dark energy.

• Modified gravities have played an important role in this sense as an alternative to $\Lambda$CDM model.
• Previous observational data has been always favouring $\Lambda$CDM model in comparison to any other model.
• While statistically speaking, alternative models have shown tehir power, fitting in some cases the observational data slightly better than $\Lambda$CDM, the significance and goodness of the fits were not significantly relevant to exclude the standard model of cosmology.