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iFixit hails replaceable LPCAMM2 laptop memory as a 'big deal'
(www.theregister.com)
This is a most excellent place for technology news and articles.
Normal DIMMs work fine but soldered RAM can just be much faster and in general better. It's not an acceptable compromise on most desktops but for laptops which also has to be smaller and need to worry about stuff like battery life, it matters more.
Sounds like there is a bunch of nuance in this topic!
But I want clear black and white distinctions and outrage!!!