I had to solve a real world problem for my current employer in my assignment. However, when they usually say it takes 20% to make a nice demo and 80% to make a

I had to solve a real world problem for my current employer in my assignment. However, when they usually say it takes 20% to make a nice demo and 80% to make a the demo production-ready, I'd say the distribution for my assignment was even more uneven. It's just a PoC, a toy, nothing that can really be used. I did not know the tools used, the coding style or anything when I coded the assignment. I see nothing unethical in it. 3 years later the feature has still not made it to production. I hate that every time it would have made my working day easier :)