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Honestly. They’re already performing miracles with RoR.

How many non Ruby apps and all the databases and systems behind could climb their traffic 14x when they probably only perf-tested for a sustained 2-3x and, and paid for a profitable amount of rack space rather than a “lol, VC money, we’ll 10x later” amount of infra.

Systems engineers generally don't run performance tests at 2x or any specific scale.

You load test and see how much it takes until the system falls over - basically you DDoS yourself and see what the numbers were when things broke, and what broke first second so on. Maybe in a sandbox maybe against prod.

It's very telling that issues began almost to the day of the Microsoft acquisition.

Suddenly after 18 years, Ruby on Rails is the issue?

Tell that to Shopify that handles 8.15 million requests per second and processes $5.1M USD per minute in sales during Black Friday. You scale your architecture, not your programming language.