Ah, I see. This might be the reason why people stay away of Z5. But there is a huge general difference of that eight months period and a drawdown of a usual system.
The 8 months period was expected in advance, had a clear reason, did not lose money, and you could read in the newspaper when it started and ended. A normal drawdown comes unexpected, has no obvious reason, does lose money, and you never know when it starts and ends.