The web you crawl is not the web you thinkMost scraping failures are not caused by clever defenses but by mismatched assumptions. Expect roughly 70 network requests and about 2 MB transferred for a median page, with scripts and images dominating. Retry budgets: Separate network retries from parser retries. Throttle network retries quickly; send parser errors to a canary queue for human review. Scraping at scale is less about brute force and more about engineering to the web you actually face: dynamic, encrypted, template-driven, and chatty.