@488cf7e2 I hope you can rollback, right? 

 @488cf7e2 Hmm. So it's essentially an e-ink tablet with a proprietary OS? Not sure what's the selling point of that against an Android e-ink tablet. Just the display? 

 @488cf7e2 @6adcf666 I usually use cl-loop. It uses maphash inside, but it also allows early return with cl-block ... cl-return-from, and a few other nice things.

And cl-block ... cl-return-from is essentially catch ... throw with an autogenerated exception name and lexical scoping.