A single massive OmniScript is a poor design because it mixes unrelated business journeys into one oversized guided process. Sales, Service, and Billing usually have different data needs, validation rules, actions, user personas, and branching paths. Combining them creates heavy conditional logic, makes regression testing harder, increases the chance of defects, and slows load/render performance because users may load logic they do not need. The stakeholder ' s " everything in one place " argument sounds simple, but it is not maintainable at scale. Better OmniStudio design separates complex processes into focused scripts or reusable subcomponents. Caching does not solve bad branching architecture. Reducing component count is not a valid goal if the result is fragile, slow, and difficult to test. Salesforce ' s Integration Procedure and OmniStudio best-practice guidance favors modular, maintainable component design.