I guess I should start wondering why no one ever use it, no one uploads 1v1 or 2v2 reps featuring it, no one streams using or going against it and no one even have it on their commander selection if its so awesome and why meta isn't about it, but about reliable call-ins for early and late instead.
It's more difficult to pull it off in 1v1s, but if I recall correctly I've seen OnCe_Ov3R do it very effectively at least a couple of times.
As for team games, it's usage is certainly higher but it's not as common as other doctrines because:
1. it's designed to only work well on maps on which buildings can play a significant role
2. requires good coordination with your teammates
3. its risk/reward ratio keeps growing the longer the game goes on
4. it's not free