Interesting points about complexity. Indeed it's everywhere the problem is when you start to silently (and unwillingly) worship it... coupled with fear of changes this can only lead to piling more and more complexity in your systems.

Good explanation of the relationship between memory and learning... it's not quite what one would intuitively think, things need to be in long-term memory first which means you need to repeat things somehow so that they end up there (otherwise they're just in the temporary working memory).