I really hope this becomes a feature and is implemented soon because as
a program manager at an engineering company, we often have to create
secondary projects per requests for PCNs (project change notice). Since
there is no way to connect the two projects, we have to comment in the
second project that it's part of a bigger project, which you can see
leaves room for error and confusion.
This is still a major problem for us. It looks like it's been 2 years
since the topic was brought up and still no progress in that direction
has been made. You have no idea how helpful being able to lock cost and
billing rates would be for a large company.