yup. Also people will keep email just because it has a URL or a network shortcut in them.
"Ok, show me the problem you reported about your shared drive"
<user opens outlook>
Oh its one of those i think to myself , the user is now going to spend 5 minutes trawling through emails looking for the one from her manager , 18 months ago , that says "Our new shared area is on this filepath : S:\idiots\idiot-team-B , or click here". , and I know that she has done that every day for 18 months.
Thats 18x4 weeks x 5 days x 5 minutes / 60 = 30 hours wasted.