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It sounds like you've experienced incremental updates or feature updates rather than a major version update. Windows 10 often receives smaller, more frequent updates that include new features, improvements, and security patches without requiring a full version upgrade. These updates are usually delivered through the Windows Update service and can sometimes go unnoticed if they don't require a restart or significant changes to the system interface.

For example, the Photos app and Microsoft Edge have both received updates that add new features and improvements over time. These updates are part of Microsoft's ongoing effort to keep the operating system and its applications up-to-date and secure without the need for a major overhaul.