It seems to me that running Windows gets more expensive every year (Apple unleashes Leopard, 29 October). You have the performance penalty, the support, and the security infrastructure to take account of.

In contrast, Mac OS X seems more cost effective with each release. You can even run legacy Windows applications full-speed now, so each Mac can serve as more than two machines in one.

We will reach a tipping point: firms cannot limp along with 1980s technology forever, even if their needs are pretty basic, namely email and word processing.

Thomas Barta