The most expensive Laravel production mistakes are the ones that work perfectly on your laptop. Locally you have one server, no cache files, no load balancer, a debug page you want to see, and a queue worker you restart by hand. Production has the opposite of all of that.
Source: [Dev.to](https://dev.to/devtalk94/5-laravel-production-mistakes-that-pass-every-local-test-83e)