My wife works from home in a related industry, and she is quite frequently transmitting work files (up to 100s of GiB) over our residential connection. We have multi-gigabit symmetric FTTH though.

I think it depends on what they're doing. If they're doing animation (which includes moving elements in live-action footage) and mostly checking the quality of motion, they might get away with proxy renders. But anyone doing critical color or compositing I would think need to do local renders on a calibrated system, and then commit the work to a remote render farm for consistency and accessibility by other team members.