FYI - I used to design Winn-Dixie stores out of AutoCAD 12 (not 2012) back in the early 90's, until they pulled out of NC. We did a lot of the same - new stores/renos went to 60% to get the cost estimate, but it wasn't unusual for one to get shelved until they determined if the revenue would warrant the new/reno package. Bad part was only getting paid for 30% deliverable...but I digress.
I manage about 1200 projects in Revit on Autodesk Docs right now, but I am a bit surprised about the conditions you have. What are the consultants using, AutoCAD? If you write the check, tell them to use Revit.
I always use workshare files to allow for multiple users to access and edit a file, even if it's just a retail store and especially with 60 users. But I also use worksets to group items, so if you're doing everything including MEP/Structure in one model, at least you can use the workset to break them up (BTW, I don't recommend having everything in one model but understand it). I got into the habit of separating the store from the content/shelving, etc. into different models to use different layout options as separate models rather than design options, since MEP doesn't support them. I'm interested in hearing more about what the 60 users do with the files.
But back to main topic - I agree that you should upgrade these, even if it's just to 2023. I've seen clients (especially government agencies) that are still working in 2016/2017 which are not even supported on Windows 11. The longer you wait to upgrade the more likely you are to encounter errors, so the risk of not upgrading is higher. You can go either way on the when, but I would not go past to an unsupported version, like 2021. I would have upgraded these to 2023 to stay no more than two releases behind. And that's the nice thing about keeping them in ACC, with the project upgrade.
I have to ask - how are you running the upgrades from ACC? A custom app, Clarity, etc.? The files still have to be opened to upgrade them, so now you've peaked my curiosity.
thanks - db
David A. Butts
Virtual Design and Construction Manager - Kimley-Horn
Revit Certified Professional/Autodesk Certified Instructor
Revit, AutoCAD Architecture, MEP, Plant 3D, BIM Collaborate Pro Subject Matter Expert
The MEP BIM/CAD Engineer Blog
