While your second sentence is definitely true, there are some subtleties that also matter. Car specs are (certainly as opposed to software specs) very exact an

While your second sentence is definitely true, there are some subtleties that also matter. Car specs are (certainly as opposed to software specs) very exact and constrained by dimensions, chemistry and physics. None of those have version numbers. Creating a particular model of a car is decidedly single-paradigm. The same cannot be said for a functionally identical clone. You could make a functionally identical clone of an app in OOP or FP, nodejs, Rust or C++, MVC, MVVM or MVU, as a polyglot SPA + backend combination... All this to say: software as an industry also lacks standardisation, process documentation and documented best practices. Software "best practices" are more like "accepted dogma at the time" or "least likely to bite us later", not "will work 99.999% of the time". Software as a product is immaterial to start with.