I have seen one, yes just one, posted Legend video that actually shows without a doubt that two different Legends at the same spot at the same time with the same settings had obviously different levels of EMI interference/chatter just because one was running V1.09 and the other was running V1.11.
Otherwise, all of the other (at least 20) videos that I have seen that showed chatter and or depth loss after updating a Legend to V1.11 from an earlier software version, have been full of user error whether it was using a poor test site, poor test procedures like digging a fresh deep hole in mineralized dirt, not showing settings, not showing the orientation of targets in the hole, not using good swing technique, and not even knowing that their settings and the detector itself were contradicting what the video maker's were actually saying in the videos. For example, numerous videos have accompanying verbal audio with phrases like nothing, not hitting it, its struggling referring to the Legend as it swings over a deep target while the detector and its actual responses are showing a totally different story.
Then brand new Legend owners and potential owners who don't know any better read these reports and go WHAAAAT?
I hope you like the Equinox 900 and that it fits your needs. I did not like either of the Equinox 900s that I owned (first one was replaced under warranty by Minelab). As far as I'm concerned after thousands of hours using the Equinox 800 and almost 1000 hours on the Legend, the Legend is the worthy successor to the Equinox 800 and the Equinox 900 definitely is not.
I trust the Legend so much, that I bought a second one at a ridiculous price from an owner that was new to detecting, read all of these reports and dumped his Legend because he thought it was messed up. It works just fine. His loss (or anxiety induced insanity) is my gain.