2021.40.6 installed today and took it for a quick drive. Multiple stops can be added - but once added, not re-arrangeable, at least not in any to me obvious way. Also, looks like final destination has to be added first, then additional en-route destinations. in order of stops.
TACC chime is useful and different from AP chime.
Since installation this morning however, despite MCU reboot, it still says 2021.40.6 update available and waiting for download... says so both on the app, in the software update screen, and via MFD green download arrow at the top of the screen...