I can’t think of an automotive brand for which I have not heard appalling stories of early large failures & a lot of them market heavily and have a tremendous “fan base”...for instance Mercedes, VW, Subaru, Mini, BMW. That’s not to say anything about any one person’s experience.
What interests me more is what secondary impact that a “failure” of Fiat in the US would have on the older Fiats in a market/interest/vendor support sense.
It would go very poorly for us, I would think...In terms of brand equity and how the brand is viewed by the US public at large.
Imagine what the Renault, Peugeot, Citroen guys must go through...we probably have it half as bad as they have it in the US.
Renault owners Club USA? They have, what, 80 members or something? The annual meeting is 60 cars? Ha ha!
I should know: I was seriously looking at getting a Renault 17 sportback in yellow, or a Matra Djet (very pricey!). Parts? Good luck!
Say what you will about the MG, Triumph, Jaguar guys...you can always get new parts, lots of support, and clubs are everywhere.
I also know this from direct experience.
I think the Italian classic cars (Fiat, Alfa, Lancia) are in the middle.
Ideally, in the USA, for classic car ownership support, clubs, parts availability it would be US muscle cars (of course), German cars, Brit cars, Italian cars, French cars...and any other oddballs like DeLorean, Bricklin, and Messerschmidt guys in a corner alone crying to themselves.
These are just my observations.