I like your marginal risk argument, particularly because I’m aiming for the 80-90% solution.
If using a BPA- and phthalate-free brewing method, such as the AeroPress, and drinking the coffee from a non-plastic container solves most of the micro plastic and xenoestrogen issue, then it’s good enough. Given all the other ways we’re exposed to xenoestrogens (TC’s Men: How to Keep Estrogen in Check from this morning is timely), going for the bigger coffee wins and then focusing on xenoestrogen exposure elsewhere is the better approach.