Network storage. MacBooks don't have a lot of space and artists like to make HUGE psd files.
Bonus points for small stuff like RADIUS for wifi and stuff. Groups charging $5/user for junk like that is absolutely awful with a high number of staff.
With a staff of 100, a single box with a bunch of hard drives is two months worth of cloud and SaaS.
TCO needs to come down by like at least 100x before I consider going server-less.