No necessarily. It depends on what has lead to the need for a rebuild. Sometimes there weren't previously the resources to "do things properly", Sometimes a fea

No necessarily. It depends on what has lead to the need for a rebuild. Sometimes there weren't previously the resources to "do things properly", Sometimes a feature might only added for a specific client, etc. You need that previous knowledge to know the "why" of things & if that why is still valid. IMHO it's more dangerous if you're working with experts who don't want to improve the system.