Re: SSD worries
It maybe custom, which is a shame and in my mind daft. but the SSD will well outlive the console... Ive had less SSD's fail on me than spinning disks, even had a bunch of consumer ones in a RAID on a production HyperV server, after 2 years they were still 98% health - 4 years later one is still the main drive in my home server.
as for easy to replace a console drive? im not sure about the XBox, but the PS4 is a user replaceable part.... it just slides in the side, no funny screws, seals or firmware.