Correct; the routing configuration is significantly different in v7.x.x. You might want to inspect the new wiki for both OSPF specifically  and the general changes to the :routing
configuration tree  before continuing.
In the case of :routing ospf network
, what you're probably looking for is under :routing ospf interface-template network=
now. Note also that, if you prefer, you are no longer required to associate interfaces with areas via a matching prefix and can instead do it by naming the interfaces directly.
 https://help.mikrotik.com/docs/pages/vi ... eId=328218
 https://help.mikrotik.com/docs/display/ ... g+Examples