This article seems to be more making the case that features are technical debt, sort of. And that's a valid point too. But it is so so easy for useless code to accumulate. At every company where I've worked as an engineer, I've ended up deleting lots and lots of code, far more than I ever write. Like, half of the codebase. Largely by applying static analysis to find code that clearly never worked, the confirming that it's not used (which is usually obvious or we'd be seeing crashes). Often times it's sad to see how long that code was maintained, with engineers wasting effort on migrating it as things changed, without ever questioning whether it's even needed.