Normal customers don't care that a phone is 'open' any more than a non-gearhead cares if a car is user-serviceable. They don't even really know what that means.
Tech folks need to stop thinking of 'open' as a selling point when it comes to consumer products and focus on the actual experience for a consumer.
It isn't a selling point for the customer. It is a selling point for the vendor, which is frankly much more important than user experience when it comes to getting phones in hands.
Tech nerds need to stop thinking that UX is anything more than at best a bonus when it comes to a platform's success.
Tech folks need to stop thinking of 'open' as a selling point when it comes to consumer products and focus on the actual experience for a consumer.