I've been manipulated into accepting the following concept, there is little difference from a machine for hobby use and a machine for commercial/production use, I should expect the same performance, repeatability, precision and power based on the platform size.
Dunno about 'manipulated', but I will go along with the demand for quality.
Perhaps one should back off slightly and treat the area as being not one monolithic beast but several overlapping markets.
There is the cheap Chinese wood router market for hobbyists. If someone wants such a machine for a few k$, fair enough. It's a hobby. Treat as such.
There is the cheap Chinese 'router claiming to be a mill' market, which is where a lot of the problems arise. I'll pass on that one.
There is the not so cheap hobby mill, which can range up to - $10K maybe? Your call.
Thene there is the serious hobby and light machine shop market. Easily up to $15k.
The last two should be able to handle hard aluminium and, I would hope, steel. I would expect tolerances down to 0.01 mm for the more serious machines, with resolution well below that.
The motor powers I quoted allow me to machine steel, SS and titanium accurately. Dunno about the speeds: I work in metric, but my machine and expectations are maybe lower than yours. That's OK: I am more concerned with quality than speed. My machine meets my requirements for quality. Cutters for steel and Ti are a bit more expensive if I want them to last.