Reinventing the common bicycle wheel

Previous submission with some discussion: https://news.ycombinator.com/item?id=6867962 (over 20 comments)

More comments here: https://news.ycombinator.com/item?id=6858585 (a few comments)

Other submissions without comment:

https://news.ycombinator.com/item?id=6857995

https://news.ycombinator.com/item?id=6857778

https://news.ycombinator.com/item?id=6856892

https://news.ycombinator.com/item?id=6603567

There may be more - these are just the ones I found with this search:

https://www.hnsearch.com/search#request/all&q=title%3A%28cop...