Granted, the price of using super caps in a mod would be outrageous, however, this theoretical build would be like the first electric car imho.
Factor in all building materials, and you may bump the price up to around $200!!!
I have never heard of any mod that expensive before..........oh wait......
A lot of money to drop on a theoretical build, but, if it can be pulled off, it would be the first of its kind. Look at the behavior of this fictional mod, and ask if the benefits would outweigh the cost effectiveness. Think of it like this, if it comes in a very durable enclosure, and fit and finish are great, than would $250 be entirely too much to ask for such a revolutionary concept? That is the heart of the matter imo.