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The world's first foldable phone maker is now out of business
(www.androidauthority.com)
This is a most excellent place for technology news and articles.
The only usecase for foldables that made sense is that since phones keep on getting bigger, so having a foldable phone would save some pocket space. However, I think phones stopped growing after 6" and foldable phones have been considerably more expensive. People are just more comfortable with a normal "slab" phone.