Paracontrolled calculus and regularity structures were given birth essentially at the same time. While the foundations of the theory of regularity structures are now fully clarified and can be popularized as a black box for solving a number of stochastic singular PDEs, paracontrolled calculus has not yet reached the same level of maturity. It happens nonetheless to be possible to compare the two set of tools and go from one world to another. This talk will be dedicated to explaining this intertwining.