Originally Posted by lall

Bear in mind that even if the bags are checked through, you are not connecting and that the risk of a no show on your onwards ticket is on you. Make sure that you schedule enough time between your two tickets to satisfy your risk tolerance for delays.
As a data point, AA is the only OW carrier which protects across tickets, both AA-AA and AA-OW.Please don't go so fast.
In June 2018, I flew Miami-PhL on AA (on a BA reward ticket) connecting to PHL-Quebec (also on AA first) and wanted to check my luggage through from Miami to Quebec but the AA staff at MIA counter said NO as the two flights were not on the same booking.
AA and One world stated policy is that they guarantee through check baggage only if the flights are on the same ticket/PNR.
Anything else is discretionary at the airport.