Everything You Need to Know About Walmart Insulin | Diabetes Strong
https://diabetesstrong.com/walmart-insulin/

Interesting reading. tl;dr: the claims that insulin is a "100 year old drug" re: accusations of price gouging ignore the fact that modern insulins are very different - and better - drugs than older formulations.

Good on Walmart for bringing the cheap stuff back to the market. But there are big downsides compared to the newer, patented, insulins.