https://news.ycombinator.com/item?id=19621799 180 comments
https://news.ycombinator.com/item?id=22462628 117 comments
https://news.ycombinator.com/item?id=8204007 314 comments
https://news.ycombinator.com/item?id=31739794 135 comments
https://news.ycombinator.com/item?id=16068305 89 comments
that's some 1000+ comments for light background reading about fork(). I think you can make some aggregate sentiment analysis from that and conclude that fork() is not great.