Thanks, just bought a base model + dock. I've got a bunch of 128GB SDs, and my only current plans are to use it for PC-98 emulation, so load times shouldn't be a problem.
You can work around this somewhat by moving things to external storage and they symlinking it back to the original spot (or so I've heard, I have the top end model and haven't filled it up yet).
IMO getting at least 256GB internal (or upgrading later) is a smarter decision.