Are you talking about OS installer? Cause this is application installer. You likely used an installer today but didn't notice it. The model on Windows is that

Are you talking about OS installer? Cause this is application installer. You likely used an installer today but didn't notice it. The model on Windows is that you ran installer program that installed the application. Installers had to do a lot more stuff than drop the application in the right place like change registry entries or write files in other place. InstallShield wrote the installation engine and build tool. Windows moved to model of .msi packages with .exe wrapped. InstallShield turned into an .msi build tool. Macos has .pkg installer for things that can install .app. Linux has .dpkg or .rpm. All of them have the installer pre-installed.