Sistem legacy tidak nyaman tetapi sering berharga, mereka menjalankan bisnis. Keputusan untuk refactor, mengganti, atau bersara harus didorong oleh biaya dan nilai, bukan oleh kebencian terhadap kode lama. "Ini tua dan jelek" bukan alasan; "ini menghabiskan uang kami" adalah.
Mengapa penting
REFACTOR (improve in place) when:
- Core logic is sound; it's holding business value
- Problems are localized; you can improve incrementally
REPLACE (rewrite/migrate) when:
- It blocks important work and can't be incrementally fixed
- Maintenance cost > rebuild cost over a sensible horizon
- It's a growing security or reliability liability
RETIRE (remove entirely) when:
- Its value no longer justifies any maintenance cost
- Usage has dwindled; a simpler path exists
