Why WordPress developer still using timthumb and what are advantages using them? [duplicate]

Its some what of an old (bad) habit of developers from back when WordPress did not have thumbnail functionality or the add_image_size() function that can be used to create custom image size.

The only thing that timthumb does better is side to side cropping instead of the WordPress built-in center box cropping.

Don’t get me wrong timtumb is still good but needs a little work for better security
with that being said there is a new fork called WordThumb which works in the same way but without the vulnerability.

and if you are looking for a total different approach alternative then check out phpThumb