[alerighi]

And even if you can recompile everything, it's still a pain to do so, and it's better to avoid doing so. Also recompiling the software may not be as simple, for example can require modifications of its source code to adapt it to newer versions of the compiler or other libraries that changed, and of course you can't build it on an older system since the ABI changed.

This is also the reason why containers are so popular these days, ship a software with all its dependencies to avoid having to recompile stuff each time you upgrade or change the operating system.