Ahh, BeOS. I used it has a daily driver for about 6 months. It was fairly nice, but my job moved from Mainframe/VMS/Minicomputer work more towards Web related work (it was along time ago for the kids reading along) and I had to put away my toy and start learning more on my Linux boxes when I wasn't working.
Spent a lot of time learning the kernel and support "kits" and porting some of my large baseball related code to it.
Could'a been a nice little operating system despite forcing me to learn C++ better.