The problem with switching to alternatives like "compostable plastics" is they need to be composted in a special facility that most people aren't going to have

The problem with switching to alternatives like "compostable plastics" is they need to be composted in a special facility that most people aren't going to have easy access to so they'll either throw them in with their recycling (which contaminates the recycling stream) or they put them in with their garbage (which, in a oxygen starved environment like a landfill, causes them to release a lot of methane as they decompose). So now the consumer often has to to decide if they want more greenhouse gases or more microplastics in the environment.