Any game longer than 300 moves adjudicated as a draw?

quote A: "How often do 300 move rated draws happen? Every 1,000 games?"

quote Prof: "How realistic do you think it is to reach 300 moves against a non-trolling opponent?"

Well, the 301-move-draw-rule was implemented recently. It is not very well known I suppose.
Without the 301-move-draw-rule, the answer to AcademicNinja is: previously it couldnt happen (there was no end after 301), but in future it will happen more and more often. Why? --> There is an incentive for the losing side to keep playing that long. I started to not resign, for instance, and many will follow.

And that also answers somehow ProfDrHack's question: It will happen more often than before, there is a (strong) incentive do keep playing for the losing side. It might not happen often now, but it will happen more and more often in the future. Really, the rule is currently hardly known, but will be known more often soon.
Result: People will resign less often in totally lost games.
(which means the storage costs somebody mentioned here are going up, cause more games are played out longer, while the case of playing 600 moves had been pretty seldom. Due to a bug, there were no games above move 655 or so.)

#162 You have a strange definition of "losing" if that player can afford every 50 moves to make a pawn move. Most chess games end by move 40.

#172 is throwing smoke grenades (=distraction)

@Munich I wanted to avoid this because it will give you enough material to troll for many more posts but here it is: You are stupid.
You repeat the same bs over and over again although no one agrees with you and everyone proves you wrong. You make up dumb arguments a five-year-old would be ashamed of. Just make lichess a better place and leave everyone alone.

#174 is just insulting, no argument here.

@others: just ignore such attempts, please read my points at #171, and if you want to say something to do with the 301-move-draw-rule --> you are welcome.

@Munich it's not insulting, it's a summary of your behaviour. I'm actually trying to help you because you need to realize what you are doing.