The newbies have showed up repeatedly, but the vitrol sure didn't help keep them around. 
Competing hypothesis: they looked at 6e, hit the same stumbling blocks most of the rest of us did, concluded it wasn’t worth their time, and dumped Shadowrun.
Difficult to know which is the prevailing factor but I don’t believe you can rule this scenario out other than through wilful blindness to 6e’s problems.
For the sake of the game, I’d rather people formed a fair first impression and went into it with their eyes open than buying the book, discovering they have issues with it, and getting frustrated. This applies to all editions of Shadowrun, all of which have their warts and ugly bits that people ought to be aware of going in.