I agree with all comments especially the most recent from thomasomeara.
We are currently using SF for processing projects which is functionality that Hubspot currently does not have. However we are looking to move the majority of staff over to HubSpot that is not project focused. This has been really hard to do as the products (HS) and Services (SF) do not sync or I am unable to map.
If this functionality was present I would get instant buy in from my colleagues and would help with the transition away from SaleForce. Moving forward we will have to double the Admin and data in both systems which is not ideal.