The LATAM lounge at SCL is far preferable to the AC-- it's spread over two floors and just opened about two years ago.
Agreed. As far as physical space goes, it is probably the nicest business class lounge in the Americas. As I was the first "ticketed passenger" ever in the lounge (the afternoon it first opened), it will "always be a special place" for me.
It is hard to find if you're a connecting passenger, or entering the airport any way other than the LATAM Preferente check-in.