Option 3) Most businesses have a lifetime, most software has a lifetime, and one day they are run for the very last time. The same will happen for code written in C++, most of it will simply die. Some might live on in a GitHub repository, never to be compiled again.

Option 4) The business core is turned into a library. Everything from the command line tools to UI all wrap this in other languages. Everything that is not the core is deleted.

With the C++ committee after the last two decades I am firmly in the I'll believe [shiny feature] when I see it camp.