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As have the last two updates to the Apple TV. I bought the first 4K model assuming it'd be future-proof for a while. Then Apple started churning out new 4K models every year. Other than Thread and Apple Music Sing support, I fail to see what these new models do that the old ones don't.
So, it does sound like your first 4K model DID future-proof you, since the later models weren't much better.
 
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