Likely the issue was that the board layout as is. Did not allow for the current 400 case to take the M2 slot in a way that users could have easy access.
The 500 case (no idea about 400) could accomodate the M2 drive and some people installed their own.
It's also weird that the 500+ comes with a 256GB drive with no 512GB offered (maybe they will offer that later).
Still, for $200 you can get a decent X86 laptop, so this $200 rpi is niche.
