Reciprocating mass in a 3.3L engine is very different than in a 1L engine. So are the power and torque levels involved. So too here are the drivetrains significantly different (torque converter automatic vs wet clutch manual - it'd be different even if the Stinger was manual, as cars don't run wet clutches.
All that extra money pays for a lot more than drive-train differences, of course. How's the stereo on your 1L bike, or the air conditioning, the ability to carry 4 passengers in comfort plus their luggage, or the crash safety?
With the folly of the car vs bike comparison oit of the way , I don't think anyone is having an over-revving issue in any way that a rev-limiter (the Stinger has one too) would impact.
The only references to over-revving I've seen mentioned have been with regards to getting revs right on a launch (too many revs and you end up with excessive wheelspin/axle tramp, too few and the car bogs down) or, with the custom brake switch enabled, holding too many revs for too long with the engine loaded up and turbo spooling while holding the car on the brakes, and then being surprised that with all that torque being generated by the engine and the wheels not turning, being surprised when something breaks.
Back in the days when the WRX was new, people kept complaining that the clutch would slip if you dropped the clutch at 5,500rpm. So they'd go and upgrade their clutches - and break gearboxes (the early 5-speed WRX gearboxes have a (largely, but perhaps not entirely) unfairly earned reputation for being made of glass - they were mostly fine if you weren't abusing them). So people toughend up their gearboxes, and started shattering driveshafts.
This was particularly prevalent in the WRX because of the hitherto unseen levels of traction the Subaru AWD drive-train provided under acceleration, and the power (and torque) levels being applied. In a RWD car with the same power/torque, traction was the limiting factor, and wheelspin relieved the pressure on the drive-train when dropping the clutch at launch. But with AWD, you have effectively twice the grip - and then something else had to give instead, and in the thoughtfully designed drive-train, that was the clutch - relatively inexpensive and relatively easy to replace.
Coming back to the Stinger - we're now seeing 400hp and above being put out by our cars, and max torque available from 1300rpm. We know that Kia limits boost (and thus torque) in launch control mode, and there's probably a reason for that (not as absolute as you might think I'm saying*). By innovating with the brake switch, we're bypassing the safety barrier that Kia put in place - like a safety barrier near a cliff, going past it doesn't immediately mean you're falling off the cliff, but it does mean we have to be more careful, and by bypassing that barrier acknowledge that we're entering potentially dangerous territory. Mechanical sympathy is a thing kids - if you're not prepared to use it, then be prepared to pay for repairs. For some of us, that is a decision we take when we start modding - we acknowledge that if we cause a problem, we're probably going to pay for it. We do our best to avoid causing problems (the JB4 is a great example here - it allows us to step over the public safety barrier and go closer to the cliff, but includes a safety harness or two in the additional checks it does, the "fail back to map0" behaviour it it detects a problem, the logging it provides, to make sure we don't fall).
* Barrier to entry comment. We're talking about a 1700kg car with 400hp, and the only real barrier to entry are a) you have a driver's licence and b) you can afford it. In the wrong hands, a 1700kg car with 400hp can be murderous, and it's a complex piece of machinery, yet "ability to actually drive" and "knowledge of even the fundamentals of automotive engineering" (like "check oil/water/tyres regularly, select fuel on a basis other than price, etc") are not considered. And then Kia had to offer those people a 7-year warranty - and to do so, they make a simple decision to configure the car for the "lowest common denominator" owner. That means that for many of us who are above that low watermark, some of the decisions that Kia make don't suit us - and that's one reason we mod.
. Seriously though, that's right on your 1-2 shift so that could be exactly what's happening on the other Stingers.
