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AM CVn binaries are potential progenitors of thermonuclear supernovae and strong sources of persistent gravitational wave radiation. For a long time, it has been believed that these systems cannot descend from cataclysmic variables (CVs), at least not in large numbers, because the initial conditions need to be fine-tuned and, even worse, the resulting surface hydrogen abundance would be high enough to be detected which contradicts a defining feature of AM CVn binaries.\n  Aims. Here we show that both claimed weaknesses of the CV formation channel for AM CVn binaries are model-dependent","authors_text":"Diogo Belloni, Matthias R. 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