My take on the subject - "If it ain't broke - don't fix it!!"
If the update goes wrong, you'll end up with a BRICK...... as a few people have discovered

Both my KN7000s still have Version 1.3 and I have no problems. As far as I am aware, the updates only correct minor problems such as errors in the German 'Help' text, incorrect reporting on-screen of the percentage usage of the SD Card and possible problems if you have Expansion Cards fitted. In the past, I had all 4 expansion cards installed (now removed and sold) and I encountered no problems whatsoever.