Yeah Rapha are expensive, beyond the point of being overpriced. But one thing Rapha do really well, which I haven’t come across with any similar clothing vendors is they have an excellent repair policy. Twice I’ve had my bibs repaired by them, at a reasonable cost, and then received Rapha vouchers for more or less the cost of the repair.
And I probably am a total poser, but I wear my Rapha bibs often, and my Rapha jacket sometimes, on the MTB. I must have missed the memo that said Rapha was for road/CX use only.