> My experience maintaining old codebases is that you are just as hard-pressed to find a justification to write code to use new language features, or even to take the time to upgrade the language and compiler version.
That's perfectly fine. You should only pay for what you use.
Your average project, however, consumes dependencies and needs to keep them updated. Just because the code you write doesn't use them that doesn't mean your dependencies don't. So everyone still benefits with each release of C++ even if the are not using fancy features.
