Not only is UNIX dead, it's starting to smell really bad.
Narrowness of experience leads to narrowness of imagination
There's no such thing as a simple cache bug.
Rule 1. You can't tell where a program is going to spend its time. Bottlenecks occur in surprising places, so don't try to second guess and put in a speed hack until you've proven that's where the bottleneck is
Caches aren't architecture, they're just optimization.
Data dominates. If you've chosen the right data structures and organized things well, the algorithms will almost always be self-evident. Data structures, not algorithms, are central to programming.