Different applications, mate. An HPC is a Vespa, a PC is a freight train.
The Vespa you can hop in, fire up and take a quick trip for light groceries, and you can park almost anywhere. Or do a slow tour along the countryside. You don't take it cross country unless you're a masochist.
The freight train takes a half hour to get started, but can go a lot faster cross-country and pulls massively more tonnage. They each have their purpose and place in the scheme of things.
Now I'll be the first to admit having felt frustration at the limitations of my NECs, but then I was asking it to do things it wasn't really meant for. But it's game to try!
Frankly, either waiting for Tiny Tim to run through a big formula-intense spreadsheet, or waiting for Big Iron to fire up and get all it's gears in mesh, it's all a tradeoff.
Patience is a virtue. The waiting 'trains' us to be more virtuous...
Oh, and Riclamer, congratulations on your resourcefulness! When can we get a full review or at least a show and tell?