Probability (color-coded) of detecting a galaxy with our basic blind source extractor in an intensity map affected only by confusion as a function of its position in the SFR-z plane. The lower right panel is the probability of detecting the source in at least one band, while the other panels are for a selection of single bands. The two gray tracks show the position of a galaxy exactly on the main-sequence relation (Schreiber et al. 2015) for various stellar masses. The dashed black line shows the evolution of the knee of the infrared luminosity function L_⋆ measured by Traina et al. (2024).