i think its a double standard when it comes to old platforms. everyone whines about how the upcoming Z35 is based on the Z34, but not a word about how the 981 and 982 are pretty much the same car with different front and rear treatment and the lose of the flat-6 for a crappy sounding flat-4.
from what im reading on the BMW side it's the Germans that are wanting to kill off the G29 after 2025. a bit hard to continue a partnership when it's the automaker that is doing to the supplying and R&D that wants to pull the plug.
back on topic, since it's not a straight up F car; the...
here is the 86's front bumper for those that haven't seen it. i think it looks a lot better than the goofy facelift they did in 2016.
https://www.ft86club.com/forums/showthread.php?t=143930
it depends on which market. the Z4 does WAYYYYYY better than the Supra in Europe.
https://carsalesbase.com/europe-toyota-supra/
https://carsalesbase.com/europe-bmw-z4/