For the "clean diesels" including the VW common-rail engines, the problem as far as durability is concerned, isn't the engine itself. It's the fuel injection and emission control components.
HPFP. DPF. EGR (low pressure) including that infernal back-pressure flap. EGR (high pressure). Turbocharger. Intercooler. SCR (where equipped) or LNT (which was VW's failure point). High-pressure injectors. Glow plugs. All the sensors that make all this work. There's a lot of expensive stuff there.
My current daily driver has: 3-way catalyst, O2 sensors before and after catalyst, evap system, and a fancy variable valve timing system (and these have proven to be quite reliable). That's IT. No turbo, no EGR, no MAF sensor, no particulate filter, no high pressure fuel injection system.
I do not think "clean diesel" engines from any manufacturer will have exceptional durability - the engine itself may be OK, but it will be too expensive to keep them running. That's why I've gone back to plain ordinary non-turbo port-injected gasoline engines - but with advanced VVT systems, which help with the efficiency. The efficiency doesn't match diesel ... but there's a lot less to go wrong.