I suspect that nothing fitting a reasonable hobby budget exists, but anyway...
I wonder if there are tools for solving things like potential gradients and current density on real world PCB layouts of the sort that would give you headache trying to replace them with lumped components - ground planes, planes with holes and cuts, pours, tracks with more width than length or with variable width, that sort of stuff.
Some sort of brute force finite element analysis or similar method. Feed the PCB design files in, get the heatmaps out.
I see some mentions of high end CAD packages supporting such analyses for high speed digital and RF, but frankly, even DC resistance could be useful.