They’re a fairly common design pattern https://en.m.wikipedia.org/wiki/Circuit_breaker_design_pattern https://en.m.wikipedia.org/wiki/Circuit_breaker_design_pat

They’re a fairly common design pattern https://en.m.wikipedia.org/wiki/Circuit_breaker_design_pattern https://en.m.wikipedia.org/wiki/Circuit_breaker_design_patte.... However, they certainly aren’t implemented with the frequency they should be at service level boundaries resulting in these sorts of cascading failures.