Fair enough. Although Asus sells at least one laptop with 8 GB of soldered RAM, too.
Granted, it's "only" a Chromebook, but still.
Soldered RAM is almost always a bad thing, no matter the size. Maybe when it's the most the mainboard can support it's not too bad but even then you're out of luck if it ends up dying.
As far as I understand Apple is partly doing it because of the higher memory bandwidth, which is necessary for the way macOS manages memory. I still don't like it but at least they're doing it for a reason.