These are much smaller communities but not a lot of discussion in them. https://www.echojs.com https://www.echojs.com - HN for Javascript http://www.datatau.co

These are much smaller communities but not a lot of discussion in them. https://www.echojs.com https://www.echojs.com - HN for Javascript http://www.datatau.com http://www.datatau.com - HN for data science.