[granitepail]

The Art of Assembly is, itself, an immensely useful and dated piece of work. I remember flipping through this years ago. Certainly worth the read, though it's likely not worth pouring one's self into too far, as it isn't so easily applicable these days.

[GeorgeTirebiter]

...unless maybe you want to write highly-optimized code for special applications, or maybe to write compiler code generators. Assembly language knowledge is still useful otherwise to understand what the machine really does.

[scott_s]

Someone has to write the systems code you depend on.