Just for overall perspective, the F-15 and F-18 are made in the same factory in St Louis, though I can't speak to the demand/capacity on the F-15 side. I think the Rhino Blk III production/SLEP keeps the line open for another year or so. There is some continuing FMS interest in Growler and Rhino. Bottom line, everyone was flailing their arms when we thought the Rhino/Growler line was going to shut down way back in 2015, and here we are 8 years later, still cranking them out. I made 3-4 trips per year to St Louis when I was at HAVOC and HIGHLY recommend folks go there and tour the production lines - even if you're not in that platform.
I get it, the A-10 is going away - something which is LONG overdue, frankly. I don't blame the smart folks in that community for looking at every alternative, but the proposed Rhino solution feels an awful lot like grasping at straws.