Hi Maxi Contieri,
Thanks for the prompt response. However, I am still on the fence. In my current project (React & Redux), we exclusively use (anonymous) functions as they are small and writing unit tests are just a breeze.
I just feel like they've been convenient enough.
The code is well maintained from time to time, but no one talked about switching to use Class helpers.
I doubt if it's just a matter of preference or the scope of the projects. Mind if I ask for some more examples for the Problems you mentioned in the Code-smell-21? I'd be very glad to have a better view and understanding.