Colleagues keep telling me to change to Code

I own a small agency and currently use Claude's Projects/Co-work feature to set up spaces for each client (handling campaigns, web design, benchmarks, etc.). In each project, I normally do load all the core context: brand voice, design assets, specific rules, and guidelines. What works for me is that each client has it own context. However, friends and colleagues keep pushing me to change to Claude Code for a long-term usage. My doubt is: I don't see how that's better. How do you easily separate client cont