Those applications generally haven't been focused on putting ridiculous horsepower in a tiny format and then running a highly variable load while dissipating heat.
For example Axial flux motors are still very much being developed with a steady flow of breakthroughs (Magnax, Emrax), and have mind bending power to weight ratios. A lot of the current issues seem to be around heat dissipation, which is where I am hoping some of the next big wins are.
I'm a bit sad that currently easily available motors are currently not in the same league as Tesla (I have a 50kw Me1616 and Sevcon 4 sitting on my bench) but it looks like that is slowly changing.
For example Axial flux motors are still very much being developed with a steady flow of breakthroughs (Magnax, Emrax), and have mind bending power to weight ratios. A lot of the current issues seem to be around heat dissipation, which is where I am hoping some of the next big wins are.
I'm a bit sad that currently easily available motors are currently not in the same league as Tesla (I have a 50kw Me1616 and Sevcon 4 sitting on my bench) but it looks like that is slowly changing.