Well I’ll join in this thread, as I’m still after something I can wear all day under normal clothes, but has a proper pad to keep my bits out of the way when hopping on and off the uni. A small pad as you get in triathlon shorts would also be ideal – not doing huge mileages in them, and I’d rather the pad was less noticeable when walking around than in the Endura undershorts I have. I often wear my tri-shorts, but they’re not the most comfortable thing to wear all day – something similar in merino would be perfect, actually cotton would probably be fine.
Ultimate riding performance really isn’t that important for such an application – if I’m after that I’ll just wear normal lycra. Why do makers of undershorts prioritise riding performance over loafing comfort for something not really intended for serious riding?