I'd love to drop Python and go all in with a true array language (i.e. not Matlab), but you only really have 4 options:

Dyalog APL, J, Kdb+, Shakti.

All of those are closed source and expensive (Dyalog is fairly affordable, but still a paid product) with the exception of J. J is a cool language, but isn't quite my cup of tea.

So if one of the new projects ever picked up steam and got a decent sized community with hooks into all the same numeric libraries as Numpy, and some decent charting libraries...then we would have something nice.