Apple no longer sells the 2015 MacBook Pro Goodbye, USB-A ports and SD card slot July 12, 2018 https://www.theverge.com/2018/7/12/17564098/apple-2015-macbook-pro-stops-selling
New not refurbished models of the 2015 are still being sold while supplies last and the keyboard has been re-reengineered for 2018 models although still uses the butterfly.