Console yourself, then, that at least the GT86 comes relatively well equipped, and that you’ll have a lot more fun in the meantime.
You’ll also, if driving carefully, be able to return more than 40mpg over a gentle touring route; a figure that, thanks to the absence of a turbocharger, drops only to 15mpg on a track day (which doesn’t sound great, but is considerably better than we’d expect from a 260bhp-ish turbo four).
Overall, we returned a very respectable 30.2mpg and would expect most owners to better that. For the amount of entertainment you get, that’s a pretty good deal.
Buying a GT86 makes sense in several other respects too. It's not overly expensive, servicing won't be costly and its reliability should prove excellent. That means that the Toyota, as well as being fun to drive, will be simple to live with and easy to enjoy.