Try Disboard.org - I found a few decent ones on there, and slowly networked my way into a few private ones. Some occasionally pop up in HN comments also. I left

Try Disboard.org - I found a few decent ones on there, and slowly networked my way into a few private ones. Some occasionally pop up in HN comments also. I left a lot of servers recently so I'm afraid I don't have any to offer you for those topics specifically.