The hardest part of replacing a legacy system is not the technology, but historical data migration and switching user habits.
The hardest part of replacing a legacy system is not the technology, but historical data migration and switching user habits. This article draws on our practical experience serving more than 3,000 enterprise clients.
For legacy system replacement, we recommend a parallel-run strategy: run old and new systems in parallel for one business cycle, and switch only after data verification is correct.
Data migration requires cleaning before migration. Moving ten years of junk data into a new system is the most common cause of failure.
Start with a data inventory: which tables are active and which have long been unused. Often half of the historical data does not need to be migrated.
There is no absolute right or wrong in technology selection; the best choice is the one that matches your business stage.