The reasoning behind my theory of tolerances and software comes from 2 bad experiences with fly by wire throttle cars.
The first being an Astra which was borderline un drivable at times. It would die as you pulled out of junctions and backfire on change up if you used full throttle and high revs.
I eventually complained enough and Vauxhall sent a factory tech / trouble shooter to look at it. When it was revved with the bonnet open I figured out what the odd whoomph noise was. It was un burnt fuel igniting in the inlet manifold! At which he concluded that he knew what was wrong. He'd seen it before and told me it was due to tolerances and there was nothing much he could do. Although they did remap the ecu. This did improve things slightly but caused pre ignition. To be honest I couldn't have cared less. It was a lease car and I hated it with a vengeance by now. It was like the scene from Faulty Towers, I could have genuinely thrashed it to within an inch of its life. In fact some day's I would deliberately drive it on the rev limiter pretty much all day. It actually survived to 3 years / 100k miles.
The second dog was a Toyota Avensis diesel. Another fly by wire throttle.
If the trip computer could have talked it would have gone something like "thankyou for requesting 100% throttle. I will consider your request" cue 2 second pause followed by " I've considered your request and I don't feel like doing that, you can have 20%. Thankyou for risking your life with Toyota today"
Felt like it would last for ever but hated driving it in any sort of urban traffic.
I can really empathize with people who are suffering drivability issues compounded by the ridiculously poor response from fiat. Other manufacturers have actually been in way worse positions but they have reacted, recalling literally millions of cars.
I guess you mean subjective and I won't bother saying it again. It has no issues with hill starts.
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