Mikrotik is finally listing one of their 40gig switches on their website the 24+2 SFP+ and QSFP combo model, taking a look at it I wish these were available when I had to order data switches although i'm suprised to see a lower license level and memory included compared to the 10gig only CRS317(not sure why is this a difference in architecture or an attempt to make the CCR's more distinct from the CRS products)
MikroTik
MikroTik