In case of using it as library - if you write some application you use different api to make things work, for example call api to write info into file. But, if

In case of using it as library - if you write some application you use different api to make things work, for example call api to write info into file. But, if you face with scaling or other problems in most cases you need to rewrite code of your application, for example set up buffer before writing to file. If you use frozen you can define format in which you dump info to it and stop touching code and binaries of your application at all. Quick changes in configuration file to add buffer, or write into memory, or flush info by network and everything is working.