I’m surprised that “Add caching” is not on that list. Maybe he bundled it under one of the first four. Caching is used so extensively as an optimization method

I’m surprised that “Add caching” is not on that list. Maybe he bundled it under one of the first four. Caching is used so extensively as an optimization method that we don’t even notice it. L1 cache, edge computing, memoization, web browser cache, and file system caches are examples of how pervasive caching is.