It's safe to assume that points 1. and 2. are mostly due to tool limitations, siloed working arrangements, or poor organizational communication. There is no enterprise-ready design tool on the market that currently provides a robust enough code export for teams to automate the handover process. Neither have I ever met an engineering team that would adopt such a feature! Likewise, a tool won't fix communication barriers or decades worth of forced silos between departments. This will likely change in the coming years, but I think that these points are an understandable constraint.
Point 3. is a concern, though. Is your brilliant design system adoptable? If we're spending all this time working on design systems, why are people not using them effectively?
[
add
]
[
|
|
...
]