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Report says Apple is working on a 20.5-inch foldable MacBook Pro that might arrive in 2025
(www.phonearena.com)
This is a most excellent place for technology news and articles.
I have an old 2011 17” MBP (that still works great) and a new 15” MacBook Air. The 15” is a lot smaller than the 17”. A 20” with todays thin bezels would probably be close in size to that old 17”.