Do you need a new target architecture?
As usual my answer would be it depends. To say yes or no to this question I usally look at five different things.
Changes to your business model
Changes to your operation model
From products to services and subscriptions
Software becomes part of you services
Regulatory changes
If any of these five business drivers are relevant for you, then you need an updated target architecture on Enterprise level.
Why you needed it? Main benefit is to identify the complexity of the changes when driving a digital transformation.