Depends on which model you get and how you configure it. You can easily get up to 96GB of RAM and 8TB of SSD, if that's what you really want. It's damn bloody expensive to do that, but the possibility is there.

So, you can't legitimately say that the memory is always low and the disk is always small. That's just a configuration thing. If you don't configure it right, then I don't hold out much sympathy for you.