Ask HN: Where can I discuss random ideas?

I often have a thought or insight and I want to have a conversation about it with interested people. Usually the quality of discussion is best on HN. Sometimes you get a good response to an Ask HN, sometimes it doesn't feel like the right place to post it.

I always struggle to find the best place to generate the best discussion. It's like its spread across Reddit, Discord, Slack, HackerNews, Twitter, etc.

Anyone else struggle with this?