I went to happy hour after posting, then met a friend who is an airline pilot (but here on vacation). He spent 15 minutes online researching the approaches and didn't find a published one for that approach on runway 28 and couldn't. So he was talking about the options the pilots would have and a lot depends upon their airline's rules. Once the tailwinds died down Air France came back (I had a friend on board, who said they landed in Guadeloupe but didn't deplane and then returned here). So while the big aircraft could make it into SXM, their published corporate rules prevented them from doing so. Somehow Spirit has more lenient rules.