The vast majority of people run Windows, not Linux. In the case of this thread, the OP wants a more efficient format and ext2 or ext3 was suggested. For most people, that's not real feasible as it won't work out-of-the-box with Windows. An option is available and I was pointing out (1) potential problem with it.
I used such a driver many years ago. I ran Linux for almost 10 years, by the way... Here's one that looks updated: Ext2Fsd Project