I... don't understand your point. My point is that boiler quality is often asked about because they're perceived by more punters as unreliable...
My point is simple. The above statement is a textbook example of a circular argument; I know the quality is bad; if it was good, there would not be so many people that are worried about it.
England lives by the motto: "We've always done it this way."
One of the results is that when we got the "new" condensing boilers gaining in the market, a large amount of people found all sorts of "evidence" that steamers were less good than "normal" ones.
Just before b-rated became a compulsory minimum, lots of "experts" were all too happy to tell you that steamers would only last 5 years.
This got a lot of people worried, and thus related questions are often asked. The fact that they often get asked, does by no means prove that the quality of the product is an issue.
A quality steamer, installed and maintained as per spec, can easily last 20 years. Add to that the change in use from 3 hours a day to 10 hours a day, and the lifespan
expressed in hours that the boiler is on, is actually twice as much as conventional boilers.