Ask HN: Did Slack/Discord help the engagement for your open-source project?

A lot of open-source projects use Slack or Discord to create a community. If you have an open-source project:

1. Have you used any of these platforms to create an active community for your project?

2. What challenges did you face while building the community?

3. If you had to start again, would you still use the same platform or opt for something different?