I've seen multiple "Ask HN" threads here on HN asking: "what app/software/tool/x you wish existed"

Examples: "What game do you wish existed" "What “missing” technical solution(s) do you wish existed" "What products or services do you wish existed for your startup?" "What are some APIs you wish existed?" etc.

What to you think of a website (subreddit?) where people would post their ideas and vote for other people's ideas? Then maybe get in touch to develop / fund?