I find this opinion to be rather odd. FANG and e-commerce firms like eBay solved scale by partitioning functionality into services for scalability. What is key

I find this opinion to be rather odd. FANG and e-commerce firms like eBay solved scale by partitioning functionality into services for scalability. What is key is to have a scalable time series db to monitor the interactions of the components and services (and microservices) that comprise your platform. Measure the KPIs around hardware, OS, software and services interactions. Monitor and alert on them, via real-time dashboards.