I agree.
The runners up would be the 2013-2015 Retina MacBooks – the second generation unibody models). They get points taken away for having batteries that are glued down with such a strong, industrial strength adhesive that they effectively render the top case, including keyboard and probably the trackpad, single use only, but at least the SSD is still replaceable AND upgradable.
Some of the newest Macs (such as the Mac Studio), do feature replaceable SSDs, but not only are they proprietary, they're also locked to a particular machine, and only swappable with another of the same size with an Apple Configurator restore (in the case of the Mac Studio). This, of course means that, while replacement upon failure is theoretically possible, it is not possible to upgrade to any size other than that which came stock with a particular machine (say you buy a Mac Studio with a 1 TB SSD, and that SSD fails. You can only replace it with another of the same size, which in this case is 1 TB. You can't install a 2 TB module form another Mac Studio. It won't work).
I'm not sure if Apple would ever allow upgrades, but I doubt it. They're such control freaks nowadays that you can't do anything that they don't explicitly allow without some hoop jumping, which can sometimes be extreme.
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