First time I’ve heard of this, but it wouldn’t interact badly with secondary HDD mounted on, say, ~/Storage/{partition name} right? I’ve kind of come to prefer that over mounting on /media/.
Personally I still prefer pamac because it looks nicer. Yes, it can be buggy and slow at times, but it looks good and more intuitive for me, as an on-and-off Manjaro user. So I’ll probably just install pamac-all anyways.