Presumably natural fibers (wool, cotton, hemp etc) can be composted (conveniently ignoring buttons etc) and everything synthetic can just be landfilled (what else can we do with plasitcs).

Im a bit of a cynic but it’s acceptable to “dispose of” items. Hopefully we can keep in mind reduce, reuse, and recycle but there’s a functional limit to those things.

It seems likely any “trash handling technology” to arise to settle this has bigger fish to fry than just clothing - if any “plastic eating microbe” was employed commercially it makes more sense to me to stick it on the landfills rather than an old laundry basket