Welcome. Sorry for my English.
1) It is convenient when one window you can open multiple projects.
2) In netbeansy when the project is created, you can choose which files and directories that need to be loaded.
For example, I choose these directories:
/project/templates/mytemplates and /project/module/mymodule
because I do not need pictures, the total size of which more than 500Mb
This prevents the switch from NetBeans on PhpStorm