DEAP-3600, with its 3.3 tonnes liquid argon target, is a dark matter direct detection experiment set at SNOLAB in Sudbury, Canada. Since 2019, the experiment has held the most stringent exclusion limit in argon for Weakly Interacting Massive Particles (WIMPs) above 20 GeV/c$^2$. Detector upgrades have been ongoing since the end of the second fill run in 2020 to reduce the backgrounds from shadowed alphas and dust dissolved in it in the upcoming third fill run. In parallel with that, the physics reach of the experiment has been widened, with unique contributions to the WIMP search within the Non-Relativistic Effective Field Theory, also including the impact of the galactic substructures to the dark matter halo, while setting world-leading exclusion limits at Planck-scale dark matter candidates. More recently, the collaboration has investigated the $^{39}$Ar activity and the $\alpha$-particles quenching in argon while developing a detailed Profile Likelihood Ratio WIMP search on the entire second-fill dataset, which will push the experiment down to unprecedented sensitivity.