In RouterOS V7.2 PIM doesn't exist anymore.
There's
a thread claiming that PIM-SM doesn't work right, but it is supposed to exist. My example is simpler than the one in that thread, though, so perhaps it will work where that one doesn't.
If my attempt also doesn't work, I recommend that you
report that to support, if only to let them know there are people who care that PIM-SM works properly. I don't do it for you because my uses of multicast are on a flat LAN, so I have no standing in the matter.
It's replace by PIM-SM.
No. PIM's Sparse Mode (SM) is the only mode RouterOS has ever supported. The only thing that changed in this regard is that "/routing pim" is now called "/routing/pimsm", though you can still get to it with "/routing pim" by making use of the v6 naming compatibility and abbreviation features.
What
actually changed is everything in my command below that level, which is part of the
big routing redesign in v7. They just haven't gotten around to documenting this aspect of the change yet.
The open question is if, in all this redesign, they broke PIM as claimed in that other thread.