The Summit and similar supercomputers run the HPCG benchmark at about 1.5 % of their peak speed.
If a Ferrari Enzo (max speed 350 km/h) runs at even 1.7 % of its peak speed, it would still obey the United Kingdom 1865 Locomotive Act (the "Red Flag Act") requiring a man carrying a red flag to walk in front of a vehicle and limiting the speed to 4 mph.
For modern supercomputers, running the HPCG benchmark is as difficult as running a country road for a Ferrari.
Supercomputer users in simulations are like countrymen buying Ferraries. What about building a "pickup" supercomputer for them, less exciting, but cheaper and better suited for unpaved roads of sparse matrix computations?