A large portion of legacy systems integration can be solved by asking the question “which data must be updated in real-time and which can wait for batch process

A large portion of legacy systems integration can be solved by asking the question “which data must be updated in real-time and which can wait for batch processing?” Screen scrape data from legacy terminal apps, export into SQL middleware, have the new app interact with the SQL middleware via modern APIs. All legacy data gets batch updated back into legacy systems, all new data gets stored and accessed in middleware. Eventually, the middleware becomes the primary data source and the entity can save on the electric bill.