Often, yes. First establish what the system does for the business, which parts block change and whether the team can build, test and release it. Age alone is not a reason to replace working software.
Compare options per component - Upgrade a supported framework, runtime or dependency. - Replace one capability behind a stable interface. - Move infrastructure while retaining the application where appropriate. - Migrate and reconcile data with a rehearsed cutover. - Keep a component that still serves its purpose.
A change of supplier may first need access recovery and knowledge transfer rather than an architectural rebuild. A product that cannot be released reliably may need stabilization before a migration.
Protect the operating workflow Identify critical users, business rules, integrations and recovery needs. Rehearse the affected migration on an appropriate copy. Define what you compare before and after, who authorizes the switch and what happens if the result is wrong. A rollback route needs to account for data written during the change, not only application code.
Legacy Modernization explains the staged approach. Hyperstate AI describes a particular architectural change; MyMerch shows targeted improvements without an unnecessary full rebuild. Neither is a guarantee of a disruption-free migration for another system.
Useful first input: the technology and versions, who maintains it, the change you cannot currently make and what the business cannot afford to interrupt. Share a system outline, not credentials or production data.