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).
only issue with microsd is very slow writing speed. For games that are in the dozens of gigabytes you will wait a LOOOOONG time for the process to finish,