I agree that it's stone age to work locally, but there are institutional environments where designers can't get the bandwidth they need to run without the freezes or hangs.
When you can get bandwidth analytics on the network traffic, you can see the difference of what a 12-page Word document produces versus a 12-page InDesign document. It's tremendous. And InCopy is a lightweight, like Word.
Generally, IT departments don't know how InDesign files tax a network and usually set the server, network, and workstations as if everyone is using MS Word all day long.
IT should look at its complete setup: the server itself, the network, switches, protocols, settings between Macs on Windows servers, even the RJ45 LAN cables. One client had an old Cat5/100 cable on a workstation instead of a 1000. We've found that certain security software/settings slows down the process too; example, scanning the files every time InDesign refreshes the user's screen and makes the call to the server for the files.
Since the OP mentioned that their Macs are tapping into a Windows server, it's likely that IT hasn't optimized the settings to allow the Macs on the Windows network. And they might not be able to, depending upon their network and other requirements.
All it takes is one throttle somewhere in the system to cause the slow down. Most likely, IT will spend quite a bit of time trying this and that to improve the situation for you.
If that's the type of situation the OP is in, then we've found that the best solution is what I recommended above: put the graphics team on a separate node of the network. It's easy to set up a NAS that pipes through to the server and keeps the bulk of their traffic on their NAS (or other type of "server"), and keeps them from fighting for bandwidth on the main server. And they can still tap into the main server as usual to grab files, perform automated backups, and other shared network services.
The theory is like building hi-speed HOV commuter lanes on superhighways versus being stuck with the regular vehicle traffic. Giving InDesign it's own "HOV lane" is one of the easiest and best solutions.
(And as former configurators of high-end design and digital media installations for corporate and government, we love NASes. They more seamlessly allow Macs and Windows to co-exist on the same network.)