Throughout the transformational journey, legacy IT and modern solutions can actually co-exist. Achieving transformation does not require replacing legacy systems, but rather factoring them into the execution.
New, transformational solutions are being built by the progressive organisations. They are doing so in parallel with their legacy systems and gradually switching business operations across.
Before we call our legacy and modern technology worlds well-integrated, we must ensure that our legacy and modern IT people are also well-integrated. As that often becomes a great challenge given the deeply differing mindsets of those living across the two worlds.