But old Triumphs and the like are simple machines which are very suitable for the Sunday morning mechanic to tinker with.
One model I am referring to is the 2.5PI - the first mass produced saloon with fuel injection. Being mechanical (rather than controlled electronically as in modern cars) it was prone to horrendous fuel condition and poor running issues; all these were largely down to a lack of knowledge on its operation. Even I remember BL garages being unable to correctly set up the fuel injection system, as it had to be all done by hand, and even BL garages had no idea! This resulted in the fuel injection system being removed and reverting to carbs, or the cars being prematurely scrapped.
Today, these issues have largely been overcome, and there are specialists who have ironed out all the niggles, but the numbers now with the system is relatively low, and a good PI now is one of the most sought after models of the range, commanding good prices. You still have to be enthusiastic to own and run / maintain one dispite the specialists out there.
But isn't this the case with the Omega - you have to be enthusiastic to own and run one, and be prepared for higher maintenance costs to keep a good one on the road. The rarer / higher spec models that are deemed to be thirsty and possibly more difficult to maintain are the cars that most Omega enthusiasts want; these models will increase in value relatively if maintained well.
Owners fall into two basic categories, the one that wants a cheap run about maintained on a shoestring, and the one that cherishes his car, values it for what it is and maintains it regardless of cost.
This is exactly the same scenario I experienced 30 - 35 years ago when I was messing about / driving, and repairing / scrapping Triumphs.
Those who love their Omega will look after it and ensure that it lasts as long as possible, and those are disinterested in them will eventually move onto another make for cheap motoring when it costs too much in their eyes to continue running it.
Time will no doubt tell.