The lib folder and its use cases
The only cases where we should use the lib folder are in these cases:
Overriding 3rd party library specifics or modules.
Overriding String class from Ruby.
For keeping logic shared by controllers, models as well as say configs or even Rake tasks.
libfolder was used a lot in old Rails where all helpers were used to be written in this folder.
Why prefer carriers over view helpers
You can refer to this BigBinary blog to learn about carriers and why carriers are preferred over view helpers.
You can read more about ActionText from the official documentation.
You can read more about ActionCable from the official documentation.
There is nothing to commit in this chapter.