These versions often boot in under 10 seconds because there are virtually no startup services to load. The Trade-offs: Stability and Security The "Lite" experience comes with significant risks:

Non-critical background services, including system restore, Windows Update, indexing services, and advanced networking protocols, are disabled or deleted entirely. High Compression Techniques

All manual and "help" documentation is usually gone. Installation Guide

Built-in tools like Media Player, Internet Explorer, and themes are removed.

While a 72MB footprint sounds impressive, stripping away 85% of an operating system breaks critical underlying infrastructure. 1. Severe Security Vulnerabilities