It's not so hard to imagine a scenario where system happens to depend on both data concurrently written into a config file by 2 processes. If the file is proper

It's not so hard to imagine a scenario where system happens to depend on both data concurrently written into a config file by 2 processes. If the file is properly written and renamed then data from one process gets lost, and/or if there is locking, one process will suddenly stall.