I'm just surprised I haven't even heard of them before (I've heard of Cadence but not confident about Allegro) - though I did manage my quasi-EE degree I think without ever touching PCB design! (I've done so before and since, but just Eagle, Kicad, and.. I think it was called CircuitWizard at school.)
As a massive tangent, I've repeatedly since thought that CircuitWizard or something like it (or whatever it's called) would actually be great for the sort of Arduino hobbyist/newcomer - it had a really good built-in component library, but quite small, and (crucially for that audience IMO) no or little choice, so really simplified. Like I need a mux of this size, or I need 4 NAND gates or whatever, and you just place that part and it lists the BOM - you're not bogged down with an overwhelming choice where to a newcomer it probably doesn't matter, or at least there's an obvious non-specialised choice.