Apparently it's just as bad if not worse for most other mass-produced beverages, including glass-bottled (https://www.sciencenewstoday.org/glass-bottles-shed-more-microplastics-than-plastic-ones-surprising-french-study-finds) and aluminium-canned (which are all lined with plastic). In fact of the three, ironically plastic bottles were found to shed the fewest microplastics in this study: https://www.sciencedirect.com/science/article/abs/pii/S0301479724037964

So buying things in glass or converting to cans makes no significant difference, and may make it worse. Plastic is everywhere in the manufacturing process (linings, filters, tubes, pipes). Soda and beer will not allow you to escape the microplastics problem.

If we could fast-forward to after the ground-shaking study that proves without a doubt that its incredibly bad for us, to the eventual 'plastic-free' manufacturing certifications that spring from it, that'd be swell. I'm thirsty.