I will motivate the possibility that particle Dark Matter (DM) is heavier than the so-called `unitarity limit', of about 100 TeV, and review the proposals to evade it. Among these proposals, I will focus on recent results on supercooled confining phase transitions in the early universe, whose implications are relevant beyond the DM problem. I will finally discuss how these scenarios will be probed at telescopes, underground labs, colliders and gravitational waves detectors. [please email a.held@imperial.ac.uk for zoom link or password]