In my experience, most non-trivial sites are similar to icebergs of code - users might see 5% of the codepath in normal usage for what they want, but there's bo

In my experience, most non-trivial sites are similar to icebergs of code - users might see 5% of the codepath in normal usage for what they want, but there's boatloads of OLAP, data analysis, instrumentation, error handling, and reporting being done on those transactions to help make that 5% both more profitable and reliable.