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They ALL have their little "quirks" to be honest. The C7 LT1 and LT4 has AFM valves that sort of does the same. You have to keep the engine out of cylinder deactivation as much as possible, otherwise the Active Fuel Management valves has a tendency to fail too. Not so much an issue with the manual LTx engines (7 speed manuals don't go into AFM unless you specifically put it in ECO mode) but automatic versions are prone to some expensive repairs.
On top of that, the oil pump has a tendency to grenade itself and cause expensive failures. Check the 6 Gen Camaro boards for LT1 (SS) and LT4 (ZL1) oil pump failures. Same problem that ate the C&D long term tester engine. Not a common issue, but common enough where if you walk in to a Chevy store complaining of a "low" or "no" oil pressure issue it's 4 weeks in the shop waiting for a new engine.
They're good, solid, reliable as long as that one or two corners that GM cut doesn't come back and bite you. Really they've been living on the reputation the LS1 and LS3 bought them.
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Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
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