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Outside the US? Then you’ll be getting worse versions of the Google Pixel 8 and iPhone 15
(www.techradar.com)
This is a most excellent place for technology news and articles.
Hasn't Samsung done that for a while?
For S23 there is only one Worldwide version with Snapdragon. They had separate versions since S7.
Since the S7? Not at all - they've been doing that much earlier. The Galaxy Note 3 was Exynos based in India and some other regions, but Snapdragon based in the US and Europe.
It's been a common thing for years from all major phone manufacturers, as far as I know. It was the reason I careful when buying a One Plus 7 Pro back in the day.