You're using the wrong numbers in that example. For S650 Mustang, the correct calculation is [63 in * 107 in/144] = 46.8 sq ft.   2026 CAFE target for cars with that footprint is about 57 mpg      

Yea, as a former Ford & Visteon employee, I learned that whenever the company does the radio silence thing one should hope for the best but prepare for the worst. Ford current head honcho doesn't provide much confidence to hope for the best though

New Beetle was always more attractive to women even without the vase.  But saying that having a GTD or Dark Horse Mustang would prevent people who otherwise like it from buying an ecoboost is ridiculous.  If anything it makes it more desirable.

The reason is probably true but the truth is they just can’t figure out how to do it without spending an enormous amount of money.

I think your math is off: Mustang 189x75 inches= 15ftx6.25ft= 93.75sq ft   Even an Ecosport (smallest recent Ford) comes in at 78 sq ft   The Fiesta comes in at 72 sq ft    Also CAFE is figured at the unadjusted ratings from the late 1970s, not the current standard of today. So an Ecoboost Mustang gets 26 MPG combined and CAFE ratings are about 20% higher, so it gets 31 combined   a Standard Mach E gets 91 MPG combined, so that would be 109 MPG overall, helping to offset the Mustangs CAFE. 

Radio silence and no concepts or any sort of future vision outside of "trust us!" is annoying.

The Acura RSX Returns In 2025 As An Electric SUV | Carscoops  

So they were about to put it out, they sent it back to redesign, and now have cancelled it again?   The writing may be on the wall for Chrysler at this point.

I wouldn't expect anything anytime soon-it all depends on how the EV market grows and how the CE1 is accepted in the market.    The CE1 might be a great product, but at the same time I have my doubts that it is actually as flexible as people are assuming it is.    If I was wagering a bet on an EV Mustang Coupe, I'd say we are at least 5 years out. But at the same time it all depends on what Ford is going to do with the Mach E going forward-does it get moved to the CE1 platform anytime soon? There are rumors of other variants of the Mach E but Ford has basically gone radio silent on pretty much any future plans outside of the CE1 and T3 EV projects, which going by some rumors I've seen (like the CE1 being a pickup and not a CUV or sedan) makes me wonder if people are conflating rumors together, but IMO it would make just about zero sense to have two EV Pickups similar in size to one another to compete with more or less the same buyer, if the CE1 is going to be a tweener between the Ranger and Maverick and the T3 being F-150 sized. The only thing that might make sense is labeling the smaller pickup as part of the Bronco lineup, which would help with the separation of the market.    I'm hoping Ford still puts out guidance like they said they where after cancelling the 3 row EVs, which is supposed to happen early this year. 

Yea, but meeting CAFE is gettin' harder and harder. Next year the CAFE target for a car with the footprint of a Mustang coupe will be more than 50 mpg. Ford needs to sell more Mach-E and also introduce electric versions of Mustang coupe. Not just for CAFE, but to keep up with competition