And really that's the main problem I see with all in ones like the iMac. Five years from now when the microprocessor and other hardware will start to feel a bit dated do you have to throw away a perfectly good display and other components to upgrade? There are still many people out there (maybe not the average user) who are perfectly capable of replacing a microprocessor or other hardware to extend the usefull life of their computers. And Apple has been making it harder for users to do this over the last few years for many of their products.
I'm a bit confused about the statement, "we were more than a little perturbed to discover a soldered CPU". Why would anyone want to switch out the CPU? Apple makes it easy to order the configuration you want so you don't have to do it later. I don't hear reviewers of a Toyota Prius complaining that it's not possible for users to switch out their engine or motor, so why find fault with computers. As with automobiles, the days of building your own computer using component parts is history, at least from Apple's perspective. I've been using a 27" i7 iMac for about 3 years, and have never had the slightest urge to modify it in any way. From my perspective, it's perfection.
Linear guides are one of the most important components required for the development of automated or computer-controlled equipment. Aluminum profile extrusions, used for these guides in machine design, can enable designed-in functional features.
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