This is it. It's common for design shops to stop on a version of Adobe that is mature and works for them. After a couple of years, you're spending less than $50

This is it. It's common for design shops to stop on a version of Adobe that is mature and works for them. After a couple of years, you're spending less than $50 per month. InDesign .indd compatibility has consistently broken with each new CS version; with this new system, you're either going to have to subscribe or not be able to interchange files in their original, (easily) editable format with clients, other designers, etc.