DISCLAIMER:
The whole content comes "as is".
All commentaries refer to author's impression.
the official site and front-end track schedule
Needless to say, this year was different for Yandex and all attendees. The chosen format of conference is controversial, I've met different POVs on this term. So, basically, talks were 15 minutes length tops, not to mention they contained some axioms, assumptions, facts and numbers, pictures and (almost) no code at all.
What's made me smile - this year previously exaggerated value of BEM came to the desired level, letting other stuff out of it's shadow