G15 low light issue

OK, but still, if you shoot RAW, then it doesn't really matter. Let's say that you want to shoot at 5 sec, iso400. That's not possible (for whatever reason), but then you can just shoot at 5 sec, iso80 instead and push the exposure/brightness a bit more than two stops afterwards in the RAW converter. The final result will be pretty much the same as if shooting at 5 sec, iso400. You are not forced to use a longer shutterspeed than you want to. But on the other hand, a longer exposure will collect more light and give you better IQ, so why not?