I've been using a wooden desk for decades and it's not showing any signs of degradation either, yet wood waste is not an environmental problem. Compostable plastics degrade very slowly compared to other compostable materials. Your normal garden compost heap probably doesn't break them down in a year. But they do decompose much faster than normal plastic, they don't stick around in the environment for millennia.
A well protected / maintained desk versus the usual stuff thrown into a rotting heap of other delicious-to-bugs and vulnerable-to-water items isn't a realistic comparison, so I don't get the gyst of this response.
Besides, I was talking about a set of products that are made from starch and cellulose. They'll break down real fast with the rest of the compost. Faster than your desk that also would degrade and get eaten up under those same conditions.
