Only a developer or product designer/manager could say for certain though.

Saving a family out of the project results in a new family based on that version of Revit too, not the previous one. If I'm correct then the content inside the project is effectively upgraded as well. I believe that the process of upgrading a project is taking into account the content that is part of the project as well. My gut feeling is that is not true after the project is initially upgraded. Assuming that is true they went on to say that upgrading the families and reloading them would avoid this repeated upgrading of content when you open a project. They theorized that Revit was having to 'upgrade' them each time we open a project, like the message we see when a linked file is still based on an earlier version. One person suggested to the other that we should always upgrade families to the latest release and then reload them all into our project after it has been upgraded. Revit 2017 - Space Naming Utility Update - It is A.I overhead a conversation the other day at Autodesk University.Family Templates and Reference Plane Inequity.Revit 2017 - View Range Keyboard Shortcut.Revit 2017 - Text Element Error Message.Multi-Segment Grid and Crop Boundary Interaction.Revit 2017 - Associate Family Parameter Tool Tip.Controlling a Solid Form with a Visible Parameter.Revit 2017 - Align Padlock and Wall Core Centerline.It adds the ability to re-create a steel connection that exists in a project with multiple of the same situation, adds parameters for weight, paint area, and bolt length to steel fabrication elements. I'm sure there will be more to come as more people start using it seriously. Revit 2020 introduces a handful of improvements when working with steel connections. I also heard that some text types were not editable at first but closing the view and opening it again helped for some reason. As I was finishing this post I just heard from someone that they are having some issues trying to use the ALT codes for special characters via Character Map. You (we all) have some text fixing to do! Please, please, pretty please with sugar on top.don't upgrade and expect to just carry on without reviewing everything very carefully. I emphasize that TEST RUNS because at this point that is exactly what we should be doing. I've also read a couple of threads in forums from users sharing what has happened with their TEST RUNS at upgrading. Damien Ferlazzo (Revit Link blog) shares his experience upgrading text so far with his POST. This is the FIRST and this is the SECOND post. Brian Mackey (The Revit Geek's Blog) has written two posts about what he's observed happen with an upgrade so far.

Revit project template upgrade