Stop / Start systems are down right dangerous, the worst one is when you come to a momentary stop on a roundabout and then you go for a small gap and boom the car cuts out, then as your trying to move off it's trying to start and you look to your right and that 40 tonne wagon that was safe to get a shift on has now almost flattened you as stop / start has just tried to kill you.
Starter motors are also not built forever so the amount of strain on one of those will be immense (yes it is designed with many starts in mind but car manufacturers ideas of 'lifetime' is a 3yr 60k mile warranty period) So anything that can reduce the wear then all the better. I have coded mine out via carista (old model when you were allowed to do so) and now i start the car maybe 2 / 3 times a day as opposed to 20/30, surely that's got to be beneficial for component longevity.