I think Pony is one of the most interesting languages out there. I love actors, I love capabilities, I love whitelisting of C/C++ usage. Sadly no armv7 support, cross compiling itself is really hard too (never got it to work), the package management support is weird and deviates quite a bit from mainstream (IIRC having multiple versions of the same dependency is a feature ) and it lacks users.

I honestly would love to have a mix between rust and pony.