Memory exhaustion for one. In my experience build systems will happily eat up all of your memory and put you into a swap hell that is difficult to escape from.

Memory exhaustion for one. In my experience build systems will happily eat up all of your memory and put you into a swap hell that is difficult to escape from. Especially painful when one of your coworkers has a beefier machine than you and changes the number of parallel jobs offhand one day, causing your computer to freeze until the OOM killer gets the right build process.