Absolutely not insulting! In fact an excellent question!
Preview was an inspiration when I started SimplePDF, my goal was to make the "Preview" of the web, so that people without a Mac would benefit from a software matching Preview in ease of use and overall polish.
Adobe Acrobat: SimplePDF has "Simple" in the name as the philosophy is to keep it simple (both in ease of use, and features): I don't intend to support everything that Adobe Acrobat does. There's a lot of features that I could build that I intentionally do not, as they would bloat the UI and hard the overall usability. Most people have very simple needs and don't need advanced features (like scripting, etc).
Preview was an inspiration when I started SimplePDF, my goal was to make the "Preview" of the web, so that people without a Mac would benefit from a software matching Preview in ease of use and overall polish.
Adobe Acrobat: SimplePDF has "Simple" in the name as the philosophy is to keep it simple (both in ease of use, and features): I don't intend to support everything that Adobe Acrobat does. There's a lot of features that I could build that I intentionally do not, as they would bloat the UI and hard the overall usability. Most people have very simple needs and don't need advanced features (like scripting, etc).