I wouldn’t say that Jobs had better quality control exactly. It was a different time.
Adding in another halfpenny, I'd say, unequivocally, that Jobs did NOT have
better quality control, the QA at Apple since the early 2000s has just been very bad. They failed to implement proper rigorous programmatic QA under him, he then went on to take pride in how fast they were moving (it became part of the programmer ethos, "move fast and break things") so it further degraded QA conceptually, and things have only descended deeper into the circles of hell from there. However, the flip-side of that is that under Jobs' 'reign' people were ****-scared to screw up and end up getting called on the carpet! Terrifying. I think
that is what is missing from Apple now. Nobody gets fired for screwing up, and many of the folks up the chain aren't as savvy, technically, as those in the trenches—as Elon says the best engineering managers are really good engineers, because they know engineering—so there is little downward pressure to keep the code clean… unlike when Jobs was stalking the halls and would/could randomly threaten your livelihood. Its pretty clear from how bad some of the niggling little bugs and annoyances are, on the iPad for instance, that no one in the Exec team actually does their own computer work… they have assistants that do all that. They
use Messages and Mail, and Safari, kinda like your mom… but they don't
USE Apple's products, that work gets farmed out to the entourage. And the assistants are so lowly, they have no juice. (Or they're no brighter than the typical nitwit who "uses computers", and is completely mystified by 'file system hierarchy'.)