They introduced a binary-compatible runtime across all future versions (2015, 2017, 2019, 2022). The internal versioning scheme (v14.0 → v14.1 → v14.2 → v14.3) all share the same core DLL names, file structures, and ABIs (Application Binary Interfaces).
While binary compatibility holds for most functions, a program compiled with VS 2022's latest C++17/20 features might call a newer exported function not present in the 2015 redist. That's why the installer merges upward – the latest version contains all older exports. microsoft visual c 2015-2022
But next time you see that installer pop up, know that you're looking at one of the most successful long-term backward compatibility efforts in computing history. That's why the installer merges upward – the
1. The Unified Runtime: A Quiet Revolution Before 2015, Microsoft released a separate Visual C++ Redistributable for almost every major Visual Studio version (2005, 2008, 2010, 2012, 2013). Each had its own file paths, DLLs, and quirks. This led to "DLL hell" on Windows: applications would install their required version, sometimes overwriting others, causing mysterious crashes. The Unified Runtime: A Quiet Revolution Before 2015,