They'll all get one when they're $5k assuming enough are made.
I'd be surprised if "production is winding down", you're in a tizzy about a month where 1,500 units were sold, Honda sold less than 1k/month S2000's in 2002, two years later the facelift came out and production continued until 2009. Mazda averaged less than 500 Miata's per month over the last 5 years and they still made a brand new kickass generation.
Toyota's shortest run for a sports car in recent memory was the MR2 which got pulled in North America after 5 years or the MK4 Supra getting pulled after 6 years on the market. It's also worth noting that combined the BRZ and FR-S match the sales of the Scion TC, is that on it's way out too?
The car has only been available for three years. You'll be seeing new 86's on dealership lots for another 2 years at the bare minimum.
There really isn't anything out there that does what the 86 can do, I crammed 3 other people into my car on Friday (along with tools including a full socket set, jack, and jack stands, chairs, and two helmets) and hit the track, the car was out there running hard for nearly 3 hours (two drivers, 9x ~20 minute sessions), put the camber back to street levels, bump the tire pressures back up and drove home getting >30 mpg.
The RX-8 can come close (but that isn't a new car sale) and if FWD is cool with you the hot hatches can also hold up well (and lets be honest having an extra 6 inches of legroom would have been nice for the drive there and back).
I am going to have to budget for two more coilpacks for my next track event though...
