That’s what I like, too. However, I think Xtar designs “plug and play” chargers, where any user can just stick in a cell and let it charge. No buttons to push, or anything to choose.
I think that’s a good approach for a family charger, but not for batteryaholics.
What I don’t understand, is why Xtar is so wrong about AAA NiMH charging. In my experience, they do choose good charging currents for 14500 cells, at 0.5 amps. So they are using the internal resistance to set the charging current, but it appears only for lithium-ion.
For NiMH cells, they always seem to max out at 2 amps, regardless of the cell size or age or internal resistance. I don’t think they’re measuring the internal resistance of NiMH properly, which is why they always use max charge on them.