I'm not seeing a decrease in Python development and investment. In the past decade I've seen a lot of effort invested in interesting and productive third party utilities and libraries. New languages still have to build those tools and such to get to a steady-state and attract more than language explorers and hipsters.

I wasn't trashing Javascript, which is obvious if you trace through the message thread. I haven't delved much into modern Javascript, since most of my work involves data and cli/desktop/network applications instead of web applications and services, so I don't have a valid observation worth sharing.