When I got back into r/c flying, after several years hiatus, I got back into it with electric power. All there was available at that time (late 90's ) was brushed motors and NiCds... (and not much at that )
NiMh cells were yet to come on the scene...

Now...there is SO MUCH available, it literally staggars the imagination! [8D]

It's hard, even for someone who's experienced, to keep up with all the new stuff that seems to be introduced every month...