No one that maintains a production grade compiler is lazy. I would say that no one that maintains a compiler of any quality is lazy. Let's replace "laziness" w

No one that maintains a production grade compiler is lazy. I would say that no one that maintains a compiler of any quality is lazy. Let's replace "laziness" with "carefully considered trade-offs" in this context. i.e. "The fact that a lot of modern day compilers don't have built in assemblers etc. are probably more due to carefully considered trade-offs".