I would not mine a soldered in AMD GPU, although one with a socket would be nice in a way.
As for RAM and storage, I am completely against them being soldered in. If the RAM and/or SSD fails, if you cannot replace it you essentially have a paper weight and/or a permanent loss of a USB port.
Also a fixed 128GiB SSD might not be enough, some users might want instead a 2TiB HDD. Then say if 2TiB SSDs that are very price affordable come out in a few years, you would regret it because you would never be able to actually use it unless you externally used it.