File systems schizo

EXT2, EXT3 were the only two file systems that mattered.
I read somewhere then that EXT3 due to its greater data security features was more CPU intensive of the two. So henceforth I used only EXT2 for all installations.
Reiser File System later made an appearance with Knoppix. It is rather strange why Knoppix would insist on using RFS.
All Linux distros can read NTFS file system, and REad and Write FAT32 file system which are the main Windows file systems. While Windows cannot natively read any of the Linux file systems, there are many freeware applications that can do this. Google for this.
I read somewhere that some distro also allowed writing to NTFS, though I do not recall the distro - but it was a matter of time anyway.