Beyerdynamic headphones are chunky, resilient, and you can buy spare parts and effectively replace the whole headset piece by piece. But they are not ergonomic

Beyerdynamic headphones are chunky, resilient, and you can buy spare parts and effectively replace the whole headset piece by piece. But they are not ergonomic for city walking/metro/bus/train. Lots of trailing bits of metal &c depending on model. And many models are high impedance (200 Ohm/400 Ohm) so less useful for portable devices with limited voltage swing. So my point is: not just fashion. Suitability for job as well.