Detailed release notes are available WordPress.org. However, here are links to more user-friendly release notes.
Version 5.9.0 (Coming Soon)
Version 5.8.0
Version 5.5.0
Version 5.1.0
Version 5.0.0
Version 4.10 – 4.3.2
Version 4.1.0
Version 4.0.0
Version 3.3.0
Version 3.3.2
Version 3.2.0
See Also
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