HPC systems account for more than a third of the installed supercomputers worldwide. Most new supercomputers are HPC systems. Using HPC Systems for Supercomputing Development software less mature.
Applications software more complicated - order of magnitude longer to develop.
No automatic parallelisation of codes. Longer term research needed into efficient parallel algorithms. Parallel Computing is becoming established, is maturing, but is by no means dated. HPC is the way of the future. HPC is strategically very important if we want to compete in a worldwide market.