Hi tclfan,
It's hard to say what made me switch completely, zenwalk is still an outstanding OS, but it just doesn't fit into my narrow view of how my pc should have evolved. As memory, computing power and HD space has increased (my first pc was a 386 running mulinux and i dreamed of the day I'd have more thabn 500Mb of HD space) i wanted my OS to shrink, grow faster, not slow down and get fat. TinyCore fits into what I wanted more than zen does i guess.
It's also pretty cool!