Comment by j_barbossa

On the one hand you have idealists who think the most important thing in the world is getting the last bit of performance out of every program. On the other side you have businesses who don't care too much about performance of their applications (especially when no money can be made out of it) as long as 80% of use cases are covered.

Whichever side you sympathize with, it's pretty arrogant to think the other side is completely wrong.