Having owned a few Miatas I can attest that they spin if you're not careful on slippery surfaces. :) TC/DSC is a lifesafer particularly when driving at normal speeds.

Driving my NA (pre-TC) was a pleasure in part because it had so little grip and so little power, that it would let go progressively and at low enough speeds that I could always catch it and not risk a serious crash. Between the squealing of tires and the immense body roll, I always knew how much grip I had left to play with. I now drive a 911, and stability control stays on permanently because I'm not confident I'd always catch it if I accidentally give it too much power (or lift off too quickly) in a turn.