According to AppleInsider [0], "Some features will also come to Safari 27.3 for macOS Tahoe, though Adaptive Dark Mode ... will require an Apple Intelligence device."

Quite a few apps now requiring MacOS 26 or higher because of the AI hype train. It's frustrating.

MacOS 15 only came out 2 years ago and isn't end of life!

[0] https://appleinsider.com/articles/26/11/03/apple-brings-3-bi...