It's useful for projects where maintaining tests is impractical such as the linux kernel. When someone tries to find a regression in the kernel they are probabl

It's useful for projects where maintaining tests is impractical such as the linux kernel. When someone tries to find a regression in the kernel they are probably going to write a test which grep's dmesg for a certain output, or sometimes the regression is a kernel panic and you are basically checking if your system crashes or not on each bisect step.