I know a couple mastering guys who use a couple comps at once through series (one patched into the other) or parallel (one blended into the other on 2 separate channels)
I think it can be a little heavy handed or over the top or would imagine the music would have to have a lot of space to begin with or maybe they aren't pushing them that hard at all, ...but for me the brickwall limiting is in essence an aggressive compression so you adding 2 more on top... that's 3 compressor actions which seems like a lot. I think for maybe some rare situations that might work to solve some problems, but couldn't see it being used a extensively.
understood, and I agree the process being heavy handed. I mean I never have had two compressors in the mastering chain the one I do use the settings are not even really doing anything just peak control really. So two in one chain sheessh!! someone is just along for the ride dont see the point. But like you said maybe in some "RARE" situations it could be viable. I mean I agree less is more with anything anyway.