Steel is cheaper, stronger, and will outlast the alloy counterpart by many factors and 4 months is not a good field test unless you are racking up immense mileage... a quality steel cog on a bike with a perfect chain line can run out for 10,000 km or more while an alloy cog might last 4000-5000 km at best.
You are right about that. I wasn't saying it's awesome though. I was kinda pointing it out that it works OK as most people are "guessing." But that being said, I would prefer steel cogs. I don't contest you there.