Hopefully there is room for all kinds.... At one end of the spectum is the dealer who throws together "you fix 'ems" for the lowest possible dollar. Just to balance things out, there almost had to be at least one perfectionist who reworks them till they are like the factory should have made them in the first place.
I don't have a problem with either type of dealer as long as they aren't trying to make themselves out to be the type that they are not.....and that cuts both ways.
I'm also thinking that the backbone of Yanmar's popularity is the durability of their average 2nd hand tractor. I see lots of them and am always surprised by how similar that they are. They run the same and even sound the same. By now, the average Yanmar is a 20 year old machine with a thousand hours, a few leaks, questionable maintenance, and needing to be plugged in to start in cold weather. If it was lucky it got to live in a shed sometimes. Yet the silly thing goes on working day after day and year after year without anything more than an oil change and the occasional battery. That average old Yanmar tractor may not look new, but most everything (except those darn brakes) works as well as it did when new. If anything, the engine runs even better now that it has a few decades on it. They do what a good design is supposed to do: they get to a certain age and then just seem to stop aging....and there's nothing wrong with that, either.