Legacy Systems = tightly coupled architectures hard to scale, change & maintain.
National Grid tackled this with 4 paradigms:
1️⃣ #DomainDrivenDesign
2️⃣ #TeamTopologies
3️⃣ #EventDrivenArchitecture
4️⃣ #ChangeDataCapture
Details in the #InfoQ article ⇨ https://bit.ly/44UplDs