Isolation by application
Applications served by the same team do not need to share the same execution context.
Why separate identities, sessions, temporary areas and limits make each project more predictable to operate and reduce failure propagation.
Separation by project
Boundaries that support operations
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Identity Each application has its own context
Clear attribution prevents one routine from operating as another application.
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Consumption Limits make pressure observable
Memory, time and tasks can be related to the project.
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Maintenance Changes follow each system lifecycle
Evolution and diagnosis stay associated with the correct owner.
A dedicated context reduces ambiguity
Execution identity, session and temporary space define the practical application boundary. This separation makes it easier to know who created a file, started a task or consumed a resource.
Without that separation, something shared for convenience becomes a hidden dependency, usually noticed on the day one of the projects changes.
Limits contain contention and propagation
A routine that grows beyond expectations may pressure memory, processing or execution time. Limits make that behavior visible and prevent the pressure from advancing without control.
Isolation does not fix the cause: it keeps the failure inside the project where it happened while the fix is made.
Projects keep independent lifecycles
Different applications evolve at different rates. Separating their contexts allows dependencies, capacity and behavior to be reviewed without treating every project as one indivisible workload.
The team remains responsible for the whole, but works in a smaller scope: a dependency update can be tested on one project before it applies to the others.