In fact, don't use such an advanced version, use a mature and popular version first, or you will have documents that others don't have and others can't open. Isn't it fun to be yourself? I started using Illustrator from 1995, and now I use CS3. The new version has not used any new functions, which is enough to meet the work requirements.
Illustrator CS4 began to have paging function. It is a great progress that different layers arrange different page numbers, but this function is not what I need. I still advocate that each software should use its main functions to do graphic design, use Indesign to assemble pages, use Photoshop to process photos, and use Illustrator to process vector pictures. The cooperation of three softwares is far more powerful than using one software.