LAN is configured at the MRTC seat pitch. AA did try this for many years, but it didn't work. In the US market AA couldn't charge an extra dollar for MRTC, and lost money against competitors with the fewer seats, thus the demise of MRTC. AA stuck with it for a long time, convinced that the market will come to value their product, but eventually gave up. This gives a deep lesson to the rest of the industry in the US, with the legacy that it is unlikely that any airline will try it again. There is now a long string of small airlines that went bankrupt with luxury service for the mass US market.