And it's always "death by a thousand papercuts". The configuration files and build system layer creep happens with the best of intentions. That interesting new transpiler, interesting new package management abstraction, interesting new declarative UI concept, interesting new tool to help with FooBar instantiation...

A few years pass, and the act of changing anything in the application will require working around bugs in an old transpiler that can't be updated because of mysterious bugs that some code relies on, configuring dependencies in an obscure package system, converting HTML into a UI layer that's a complete mismatch for the application's present design, and converting "new" calls manually into some upside-down system that is there only because of novelty value years ago.