Complex analysis is a very beautiful and useful mathematical theory. Clifford (geometric) algebra is also very beautiful and useful. So it makes sense to wonder if they can be combined. Turns out that they can. I wonder why I haven't seen more stuff about this in the wild? Probably because it's pretty new as mathematics goes. I expect it will be part of every undergradaute mathematics degree in 50 years or so. But I suppose it depends if it turns out to be as useful as it seems, by rights, it ought to be.