Storage capacity is a part of the eXperience story. Before Gmail's groundbreaking 1GB limit, you had offerings like 15mb or 100mb from yahoo or hotmail. What t

Storage capacity is a part of the eXperience story. Before Gmail's groundbreaking 1GB limit, you had offerings like 15mb or 100mb from yahoo or hotmail. What that meant for your day to day experience would be that you would literally run out of space and then have to manually comb through your inbox to delete things you don't want. And if you wanted stuff, you had to harshly prioritize between treasured message threads. These are all part of the UX