How is that fixing the issue of incompatible configuration changes? This is typically the reason why I see boot or start problems, i.e. I have made some changes

How is that fixing the issue of incompatible configuration changes? This is typically the reason why I see boot or start problems, i.e. I have made some changes to some configuration and the format, or some option changed with a package upgrade and I suddenly can't boot into the gui anymore. In contrast I can't remember when I updated a system and something stopped working because 2 libraries were incompatible. To me this is really solving a non-issue.