Though, to be honest, most engines are reliable if looked after, aside from the early Rover KV6 and the non modified Rover K4

. OK, some engines may be unlucky enough to pop a HG at 100k+, regardless of make, though the GM V6 does seem to be exempt

, otherwise most engine failures can be attributed to poor servicing.
I think the biggest problem with deseasals is the mentality of owners (NOT the educated souls on here - joe public), who buy a diesel due to covering higher mileage, but still only get it serviced annually (or when the SVS comes on, which in Vauxhall's case is the daft 20k).
I think that mentality is the downfall of the 2.5TD engine, which on U25DT units, BMW state 4.5k oil servicing, and on X25DT, 7.5k (despite being identical engine mechanically). Oil gets in a mess, some oilways start to clog, insufficient oil flow, something seizes, conrod makes an escape for outside world.
That same mentality exists for a couple of people at work with their 2.0D Zaffys, as I've mentioned privately to you before. They think the car is unreliable, one having just spent £400 odd on a new egr, despite being serviced annually, and more-or-less within the service schedule! These are both cars just out of 3yr warranty (now 4yrs old), and starting to get expensive. Is it the fault of the owner? They have pretty much obeyed Vauxhall's 'recommendations' :-/. And yes, I've tried telling them, but their dealers say otherwise, and who do they believe, Vx 'experts' or a Unix geek?