"They’re writing TypeScript that compiles to JavaScript that runs in a V8 engine written in C++ that’s making system calls to an OS kernel that’s scheduling threads across cores they’ve never thought about, hitting RAM through a memory controller with caching layers they couldn’t diagram, all while npm pulls in 400 packages they’ve never read a line of."
I'm not a paper metaphore guy so I look at this with doubt : I'm more confident to remember that Super+3 shows my browser and Super+1 goes back to my "ide", than remembering that my wanted window is on the upper left of a giant virtual screen...
I meant data heterogeneity - the variety in formats, edge cases, and data quality you encounter in production. Real user data often has inconsistencies, missing fields, unexpected formats, etc. that synthetic test data tends to miss.
This helps surface integration issues and performance bottlenecks early.