> A typical example is banks getting merged: there will be a fight to see which system stays and which one disappears. If you froze your technology 4 decades ago it won't be your stack winning. [0]

In my experience (small/mid-size US banks), the institution with more assets or branches usually wins. It rarely has anything to do with technology. If a 6 region, 200 branch monster comes in and wants to buy some 4 branch relic in the West Texas desert, it doesn't matter if the smaller institution has achieved AGI and an intergalactic core platform. They're almost inevitably gonna be merging their records into some old boring IBM system.