Actually, pro Terran builds a wall-depot in front of their B2 or B3 (do they B4 wall ? i don t remember ...).
Clem building an armory in his wall
It makes sense, it s a quality of top tier Terran and most of them stack their units in the wall. We can say walls in front of the bases is a caracteristic of the metagame but despite his usefulness, we never see any bunker inside walls ?
Pro Terran doesn t need to make a bunker cause they have no interest in doing so.. Indeed, these building have the same cost, the same amount of structure points and also depot needs 30 seconds time while bunker needs 41.5 seconds...
I would like to see bunker in wall, it could be more styl-ish.
This is not the only advantage, Terran could control the map faster (as i ve asked multiples times../ at least at casual level)
Of course this upgrade to build faster his bunker won t be allowed during proxy racks cheese...
For Pro, it s not a big buff (stuff ??), cause they have APM to control map with widow mines (upgrade seems mandatory for them now). But for casual, it would be great.