The article is an interesting mental exercise in using statistical analysis to identify issues in infrastructure, but the configurations that are assumed to be

The article is an interesting mental exercise in using statistical analysis to identify issues in infrastructure, but the configurations that are assumed to be in use demonstrate an exceptional lack of understanding around modern L4-7 load-balancing solutions, whether hardware or software. 99% of the 'issues' in the article are solved by features that are present in nearly every COTS or open-source solution - they just require knowledgable people to configure and tune them for the system in question. More than a few real-world front-end implementations lack the kind of rigorous instrumentation that's necessary to identify problems of the kinds mentioned in the article. While proper configuration and experienced ops folks tuning said infrastructure can solve most of the stated problems, very fine-grained monitoring is sometimes the only thing that allows for effective troubleshooting when things really go L-shaped.