There still appear to be zero-fee transactions if you check even past 24 hours, there were 2 transactions but as Pmalek says above, probably just miners including their own transactions in their blocks.

Surprised myself to be honest, if I recall last I looked, still scores of 0-fees a day even if the total has been going down ever since I first started checking in late 2016.

Myself liked to do 0-fee txs, just for fun. I think I even have an Electrum installation from 2.x that allowed it, but really, there is hardly a need when 1 sat/byte confirms quickly and hardly costs anything especially with Segwit. Once Lightning gets underway, we won't even be thinking of fees.