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Snide and subjective comments aside, you’ve clearly missed their point.

Even if you take away subjective opinions on Liquid Glass, the point is that the core system updates things across the board.

Unless apps have implemented custom drawing, you get a consistent-ish UI (for better or worse) across the system, whereas with windows you are beholden to whatever hodge podge of UI frameworks were chosen at the given time.

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The size and losition of the traffic lights control is not dependent of the os the app runs on but on the os the app was compiled on. So things are not updated across the board
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This is incorrect.

It’s still dependent on the OS it runs on AND the SDK it compiles against (not the OS it was was compiled on).

But that is legacy bridging behaviour, and is not compiled into the app. Apple can and do change those with time.

For example apps that compile against macOS 15 are not opted into Liquid Glass when run on macOS 26 but will be once on macOS 27 according to their transition docs.

That doesn’t really negate the OPs point.

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I found this out when I tried running an old app I compiled on MacOS several years ago, it still has the old title bar gradient and traffic light.
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That's a bad thing. It breaks apps. Apple has decided to stop supporting apps that aren't continually updated. Microsoft hasn't.
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I don’t think Microsoft’s approach to perpetually support old apps is unequivocally a good thing. It seems to be getting them into a deeper and deeper mess over time.

As a consumer I prefer Apples approach. If I were an industrial customer relying on old software to operate my machines i would prefer Microsoft’s approach.

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