I can't imagine driving most Cobras in stop and go traffic either. But not all Cobras are 500Hp with a cam that idles like 4 cylinders are dead and has pipes that wake the dead.
There are mild cars out there and he may have a 12 minute commute in easy traffic like I do. I don't drive my Cobra every day (that would be nuts
) but it would be no problem to do.
Yes, warnings are warranted. The biggest warning sign is that you are not big on mechanics. There isn't a Fake Cobra Dealership that you can take it to and there is no online help that a local shop can look up a leaking radiator hose.
But he has nothing to lose buying a modest used car. If it doesn't work out, it's no big deal.
Try it. Only you can know if it works for you.