This doesn't change much IMHO. Already when you report a bug for some years-old piece of software (as is the case for LTS distros), upstream projects will firs

This doesn't change much IMHO. Already when you report a bug for some years-old piece of software (as is the case for LTS distros), upstream projects will first ask you to reproduce with the latest version or even straight from git master. As far as they are concerned, you are always running the latest upstream release. I also have never seen any project step out of their way and try to reproduce an issue on a specific distribution. That burden is usually on the reporter.