Anyone using multi mode for 100G links within a data center?

As the title says... most people I know are either doing AOC for leaf <> spine connections at 100G, or just straight LR4 or CWDM single mode optics

I know you can do 100G over 12 strand OM4 multi mode fiber and it looks pretty cheap. Distance is pretty limited but that should be fine within a cage.

Curious if anyone is actually doing it thou