Laptop: ultralights (MacBook. This can be all soldered), value (MBA, or even the old 13" MB unibody, somewhat upgradable), powerful (13"/15" MBP, ram and ssd upgradable with standard components)
Desktop: all-in-one (slick design), value (smallish, somewhat upgradable), pro (flexible, upgradable)
And the pro models really need some semblance of upgradability, especially desktop pro.
Laptop: ultralights (MacBook. This can be all soldered), value (MBA, or even the old 13" MB unibody, somewhat upgradable), powerful (13"/15" MBP, ram and ssd upgradable with standard components)
Desktop: all-in-one (slick design), value (smallish, somewhat upgradable), pro (flexible, upgradable)
And the pro models really need some semblance of upgradability, especially desktop pro.