Eh my 2015 mustang will be the last brand new mustang I buy. Even if the V8s does not go away I probably won't support mustang anymore.
Chevy will probably follow Ford like it always does and make a hybrid Camaro.
I suspect V8 Stangs will still come but the recent tech involving fake exhaust sounds has me rolling my eyes.
As for towing, yeah, I really see 150s tow everything, 250s I see them towing boats and the like but 150s are just work trucks.