I spent a couple years working on "a portable compilation target for programming languages, enabling deployment on the web for client and server applications",

I spent a couple years working on "a portable compilation target for programming languages, enabling deployment on the web for client and server applications", but none of the code I wrote during that time actually shipped, so it's hard to say how useful that was. The technology itself seems to have turned out useful, though! I suspect "none of the code I wrote during this time actually shipped, but the project was a success*" is a common story in the industry at this point? * though my understanding is almost everyone on the project struggled to get promoted since it was behind schedule