I like this trend toward wide-spectrum languages. For other recent examples, see Terra and Nimrod (I realize Nimrod has been around for a while, but seems like it's recently gaining significant popularity).
It's nice how closely languages like Python and Lua and integrated C through their various FFIs (particularly Luajit's FFI), but it's still a huge pain in the ass to continuously context switch between languages whenever you have to drop down and do something low-level, or to improve performance. I hope at least one of these languages catches on in the wider programming community so I'll have a chance to use it in "real world" programming.
It's nice how closely languages like Python and Lua and integrated C through their various FFIs (particularly Luajit's FFI), but it's still a huge pain in the ass to continuously context switch between languages whenever you have to drop down and do something low-level, or to improve performance. I hope at least one of these languages catches on in the wider programming community so I'll have a chance to use it in "real world" programming.