system
A chat on subreddit /r/wallstreetbets
human
All drugs eventually go generic. It sometimes takes a few more years then it should though.
gpt
The problem is that isn't the case anymore, generic was for small molecule drugs that are easy to copy.  New agents that are biologics are not as easily duplicated and the resultant copies, called biosimilars, are not sold for cheap and may not even be appropriate for some to switch to since they aren't identical.