There was a recentish David Cronenberg movie about humans evolving to eat plastic so we'll be fine. Can't wait to chow down on plastic.

many organisms are eating plastics, but that is not good for us at all in the short term. A study ? bedford institute? from a while back reported that plastics that they were collecting from the ocean, were full of holes from bieng eaten by something, and if you think about plastic as a widly distrubuted, easily broken down substance with very high intrinsic energy content, that it's no surprise at all that things are eating it. But back to us, thats bad, because all.of those things eating plastic, are then eaten, and passed up the food chain to us, at the top. So what we need to know, is how far advanced the process of filling the food chain with, undesirable for us substances, is, and what the future looks like if we just shrug, or how long will the system take to clear itself out. ie: is the biosphere "saturated" or not. If not, what is the max concentration that we can expect, and when

What if there are negative byproducts of this process though? It's a leap to conclude that we're fine. Consider that we'd be placing a lot of food for fungi into the environment, in places they shouldn't be, which would likely disrupt those environments... And also, the fungi likely can't live in every place the plastic is. Deep sea, deserts, alpine, etc.