It's not JUST because they're copying Apple, it's because there's no SO-DIMM LPDDR and LPDDR uses less power (Low Power DDR).

With CAMM2 being an actual standardized thing that is fairly thin (though the modules do take up more area than SO-DIMMs) AND supports LPDDR (in slightly smaller modules than regular DDR CAMM2), we might yet get back our user-replaceable RAM. As for batteries - never have they been truly non-replaceable, but of course quick swaps aren't a thing for many laptops these days. Almost not a bad thing if you consider how often the battery latch fails on laptops with quickly replaceable batteries.