>material that is certified compostable. To be certified compostable, the product must be able to break down in a commercial compost in under 180 days and not contain harmful toxins.

That stuff doesn't biodegrade in natural conditions, only in commercial compost.

Most commercial composters grind up the 'compost', and they don't care if some plastic particles go through the whole process without breaking down.

Just like sand goes through the whole process without breaking down.

So regular plastics are "compostable" as long as you turn them into microplastics?

microplastics are the 'nature' now