typescript is worse than plain javascript. The type system is not sound and can't actually catch that many bugs; at the same time it adds a lot of verbosity and

typescript is worse than plain javascript. The type system is not sound and can't actually catch that many bugs; at the same time it adds a lot of verbosity and wasted time satisfying the type checker. mandatory code reviews on every merge are a net negative. Too many people wasting time on nits and YAGNI "improvements". Actually improving the code in a structural way is too hard and most reviewers won't spend the effort. It would be better to dedicate time and resources to code audit and improvement on a regular cadence, e.g. pre-release. A/B testing is pure cargo cult science, it has no where near the rigor to actually determine anything about human behavior (look at the replication crisis in real psychology where they use 10x as much rigor!) You might as well use a magic eight-ball.