I think you can divide 3D printer users largely into 2 groups:
- The ones that print "something" from time to time, nothing to big, like gadgets, arduino cases etc ... I think those people prefer 10m and 0.5kg etc ...
- The ones that print 24h/24h - 7d/7d (I have 3 printers up and running, 24 hours a day). I do really big projects. (trains and buildings for garden modelrailroads for example, objects with a few hundred pieces, sometimes between 10 & 20 kg per project) As said before, for me, a spool can never be big enough :-)
I even set my alarmclock in the middle of the night, to empty printbeds and start new printjobs :-)