The technical knowledge in it is both out of date, and more relevant than ever.
The particular details are long since irrelevant - even in 1996 optimizing for the 8086 was irrelevant. But the thought process, approach and lessons learnt from optimizing the 8086 are still relevant today.
In fact, they're probably more easily demonstrated through and example using the 8086 than in modern environments. I still use Abrash's S3 FIFO buffer story when I'm mentoring people.
The particular details are long since irrelevant - even in 1996 optimizing for the 8086 was irrelevant. But the thought process, approach and lessons learnt from optimizing the 8086 are still relevant today.
In fact, they're probably more easily demonstrated through and example using the 8086 than in modern environments. I still use Abrash's S3 FIFO buffer story when I'm mentoring people.
So yes, but no.