I’ve tried it. Can’t really see much difference from not using it. As others have said, being a personal user you’re not much of a target - being smart about what you run on your computer has much more of an effect on security.

In the future I probably won’t bother

I have an original reMarkable (not the 2) and whilst it’s a but slow for big fancy scanned PDFs it is generally pretty good for what I want. It does also run linux so you can ssh into it and do everything locally away from their cloud services which is nice

This reads like an AI response to me.

Mac OS has never used X11 as a primary display system. Apple had a version they supplied with older Mac OS X versions for people using older Unix applications (and half-arsed ports) but that’s been unsupported since 2012. You can install the modern “XQuartz” open source equivalent, but it’s still secondary.