There's also carpeting, synthetic fibers from clothing, PVC and PEX piping for water supply, paint, etc. The one that gets me is the plastic Brita filter pitcher. This thing is supposed to clean my water.
It took us decades to get to this point and it'll take us more time to back out of it. And we have to start somewhere.
Chlorinated water adversely affects PEX pipes. I don't know that the amount of microplastics or nanoplastics has been quantified in a study yet.
https://pubs.acs.org/doi/10.1021/acs.est.9b03673
The Brita pitcher comment is about my own growing paranoia about plastics that get scratched or cracked. I don't know the conditions and time line under which this particular formulation of plastic keeps it from shedding MPs.